{"product_id":"rock-tumbler-grit-kit-4-step-with-plastic-filler-complete-tumbler","title":"Rock Tumbler Grit Kit 4-Step with Plastic Filler - Complete Tumbler","description":"\u003cp\u003eIn this review of the Polly Plastics rock tumbler kit, the bottom line is simple: hobbyists and beginners who want a complete, ready-to-run polishing system will find everything they need in one package. The kit is aimed at users running a 15 lb. tumbler or multiple smaller barrels and stands out because it includes the full four-step grit progression plus plastic filler pellets, so customers do not need to source individual abrasives. The reviewer found the included instructions clear and the materials capable of producing a consistent, attractive polish when used as directed.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete 4-step set:\u003c\/strong\u003e Includes coarse, medium, fine and polish grits so users can run a full tumbling cycle without extra purchases.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured-by-weight packaging:\u003c\/strong\u003e Steps 1 and 2 are 1 lb. each and Steps 3 and 4 are 12 lb. each, which matches typical material needs for each stage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlastic filler pellets included:\u003c\/strong\u003e 1 lb. of high-impact polypropylene filler cushions fragile stones and reduces noise during runs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible with all tumblers:\u003c\/strong\u003e The abrasives are suitable for use in any brand of tumbler and proved capable of producing a bright shine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBeginner friendly:\u003c\/strong\u003e Clear, printed instructions accompany the kit so first-time users can follow the four-step process reliably.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe kit is ideal for hobbyists, lapidary beginners, and classrooms that operate a single 15 lb. tumbler or up to five 3 lb. barrels, since it supplies the full complement of abrasives and a noise-reducing filler. It suits those who prefer a single packaged solution and value the convenience of measured jars and clear directions.\u003c\/p\u003e\n\u003cp\u003eProfessional shops doing high-volume runs or projects requiring unusual grit sizes may prefer to buy industrial quantities or alternate abrasives tailored to specific materials. Also, users needing very small sample quantities for testing may find the larger 12 lb. jars for steps 3 and 4 more than required.\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\u003eContains all four necessary grit stages so users can complete a full polish without additional purchases.\u003c\/li\u003e\n\u003cli\u003ePlastic filler pellets protect fragile stones and cut down on tumbling noise during operation.\u003c\/li\u003e\n\u003cli\u003eInstructions are clear and printed on good-quality paper, making the kit approachable for beginners.\u003c\/li\u003e\n\u003cli\u003eProven polishing materials that are compatible with all brand tumblers and produce a good shine.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePackaging uses the same jar size for all steps, so heavier jars for steps 3 and 4 may appear less full despite containing the correct weight.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003ePolly Plastics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKit contents\u003c\/td\u003e\n\u003ctd\u003e1 lb 60\/90, 1 lb 180\/220, 12 lb 500, 12 lb 1200 polish, 1 lb plastic pellets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrit types\u003c\/td\u003e\n\u003ctd\u003eSilicon carbide (60\/90, 180\/220, 500) and aluminum oxide 1200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntended tumbler size\u003c\/td\u003e\n\u003ctd\u003e15 lb. tumbler or five 3 lb. tumbles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of manufacture\u003c\/td\u003e\n\u003ctd\u003eMade in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstructions\u003c\/td\u003e\n\u003ctd\u003eIncluded, beginner friendly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Polly Plastics 4-step grit kit with plastic filler is a convenient, good-value option for hobbyists and beginners who want a single package that covers the entire tumbling process. With measured weights for each step, clear instructions, and cushioning pellets to protect stones, it removes much of the guesswork from polishing and reliably produces a quality shine for most common lapidary materials.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan this kit be used in any brand of tumbler?\u003c\/strong\u003e\u003cbr\u003eYes, the abrasives and filler are compatible with all brand tumblers and are sized for standard 15 lb. or multiple 3 lb. barrels.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many runs does the kit make?\u003c\/strong\u003e\u003cbr\u003eThe kit is sized to support full four-step cycles for a 15 lb. tumbler or up to five 3 lb. tumbles, with steps 1 and 2 sold as 1 lb. jars and steps 3 and 4 as 12 lb. jars.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre the plastic filler pellets necessary?\u003c\/strong\u003e\u003cbr\u003eThe polypropylene pellets protect fragile stones from breakage and reduce tumbling noise, so they are recommended especially when working with smaller or brittle material.\u003c\/p\u003e","brand":"Polly Plastics","offers":[{"title":"Default Title","offer_id":48618475880667,"sku":"B01MTEB7SA","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/817EvsGe4ML._SL1500.jpg?v=1778457831","url":"https:\/\/gearmusthave.com\/products\/rock-tumbler-grit-kit-4-step-with-plastic-filler-complete-tumbler","provider":"GearMustHave","version":"1.0","type":"link"}