{"product_id":"sunlu-500g-petg-refill-1-75mm-4-pack-economical-tough-petg","title":"SUNLU 500g PETG Refill 1.75mm 4-Pack - Economical Tough PETG","description":"\u003cp\u003eIn this review the SUNLU 500g PETG Refill 1.75mm bundle is judged as a budget-friendly solution for shops and makers who already own reusable spools. The single biggest reason to consider it is cost efficiency: a 4-pack of 0.5kg refill coils delivers the same PETG characteristics-high toughness, impact resistance and smooth printing-while cutting spool waste and recurring cost. This review is written for users who want durable functional parts and consistent filament quality without paying for single-use spools.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefill design:\u003c\/strong\u003e Sold as loose coils meant to be mounted on SUNLU or Bambu Lab reusable spools, which lowers recurring spool cost and waste.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePETG performance:\u003c\/strong\u003e Blends the toughness of PETG with easy handling similar to ABS, making it suitable for sturdy, functional prints.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Works with SUNLU and Bambu Lab reusable spools and can be used with printed custom spools for broad printer compatibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrinting stability:\u003c\/strong\u003e Engineered to reduce stringing and clogging, providing smoother extrusion and more consistent results across runs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Vacuum sealed to stay moisture-free from factory to printer, which helps preserve printability and reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended settings:\u003c\/strong\u003e SUNLU suggests 240-260C nozzle and 60-70C bed temperatures, with flexible speeds depending on part needs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis refill pack is best for makers, small workshops and educators who already have reusable spools from SUNLU or Bambu Lab and want to reduce per-print cost while keeping strong, impact-resistant PETG prints. It suits users who print functional parts, enclosures or mechanical components where durability matters.\u003c\/p\u003e\n\u003cp\u003eIt is less suitable for users who rely on a plug-and-play single-use spool system or those who expect pre-spooled filament in the box; the PETG refill must be installed on an empty reusable spool before use. Also, beginners who prefer completely hands-off setups may find the spool transfer step inconvenient.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh toughness and impact resistance make parts durable for real-world use.\u003c\/li\u003e\n\u003cli\u003eEconomy 4-pack lowers filament cost if you reuse spools, offering clear value.\u003c\/li\u003e\n\u003cli\u003eVacuum packaging and engineered filament reduce moisture issues and stringing.\u003c\/li\u003e\n\u003cli\u003eFully compatible with SUNLU and Bambu Lab reusable spools and adaptable to printed spools.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCannot be used straight from the pack on single-use spools; requires a reusable spool transfer step.\u003c\/li\u003e\n\u003cli\u003eSome customers report mixed results for adhesion and occasional stringing depending on printer setup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePETG refill filament\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e1.75 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpool weight\u003c\/td\u003e\n\u003ctd\u003e0.5 kg per refill coil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack size\u003c\/td\u003e\n\u003ctd\u003e4 pack (4 grey)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensional accuracy\u003c\/td\u003e\n\u003ctd\u003e+\/- 0.02 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended nozzle\u003c\/td\u003e\n\u003ctd\u003e240-260C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended bed\u003c\/td\u003e\n\u003ctd\u003e60-70C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe SUNLU 500g PETG Refill 1.75mm 4-pack is a smart value choice for experienced users who maintain reusable spools and need strong, impact-resistant prints. It delivers consistent filament quality and sensible packaging at a lower ongoing cost, though beginners who expect pre-spooled filament should consider alternatives. Overall, it offers reliable performance and good value for practical, functional printing needs.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this filament straight from the package?\u003c\/strong\u003e\u003cbr\u003eAnswer. No, the refill coils must be mounted on a compatible reusable spool from SUNLU or Bambu Lab before use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat print settings work best?\u003c\/strong\u003e\u003cbr\u003eAnswer. SUNLU recommends 240-260C nozzle temperature and 60-70C bed temperature; printing speed can range from 50-200 mm\/s depending on part geometry.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the vacuum pack prevent moisture problems?\u003c\/strong\u003e\u003cbr\u003eAnswer. Yes, the filament is vacuum sealed to stay moisture-free during storage and shipping, which helps preserve printability.\u003c\/p\u003e","brand":"SUNLU","offers":[{"title":"Default Title","offer_id":48226055454939,"sku":"B0FG7QGHNJ","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71Ydnie8JfL._AC_SL1500.jpg?v=1770659892","url":"https:\/\/gearmusthave.com\/products\/sunlu-500g-petg-refill-1-75mm-4-pack-economical-tough-petg","provider":"GearMustHave","version":"1.0","type":"link"}