{"product_id":"refill-grit-kit-w-mjr-tumblers-12-000-grit-extreme-polish-premium","title":"Refill Grit Kit w MJR Tumblers 12,000 Grit Extreme Polish - Premium","description":"\u003cp\u003eIn this review the Refill Grit Kit with MJR Tumblers' exclusive 12,000 grit sub micron aluminum oxide polish is assessed for hobbyists and small-scale lapidary users seeking an exceptional final shine. The bottom line: this refill kit is aimed at those who already use 40lb rotary or vibratory tumblers and want a professional-level finish with minimal measuring hassle. The standout reason to buy is the included 12,000 grit Extreme Aluminum Oxide Polish, which delivers a noticeably higher shine compared with standard polishing compounds.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e12,000 Grit Extreme Polish:\u003c\/strong\u003e Provides a sub micron aluminum oxide finish that produces a deep, mirror-like polish on stones and crystals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremeasured Stages:\u003c\/strong\u003e All four stages come premeasured for a 40lb tumbler so users can pour and run without calculations or weighing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete 4-Stage Kit:\u003c\/strong\u003e Includes coarse 60\/90, fine 120\/220, pre-polish 400\/600, and extreme 12,000 grit to cover the full tumbling process.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorks with Rotary and Vibratory Tumblers:\u003c\/strong\u003e The formulas are compatible with common tumbler types, offering flexibility for different setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClear Instructions:\u003c\/strong\u003e Each purchase includes step-by-step polishing instructions with tips and tricks to improve results and reduce common mistakes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis kit is best for hobbyists, rock collectors, and small workshop users who already own a 40lb capacity tumbler and want a premium finish without measuring grits themselves. The premeasured stages save time and reduce setup errors, making it suitable for users who prefer a straightforward, repeatable process.\u003c\/p\u003e\n\u003cp\u003eIt is less appropriate for someone who never tumbles before or who uses much smaller or much larger barrels without adjusting portions. Buyers on a tight budget who prioritize minimal cost over top-tier shine may want to compare quantity versus price before committing.\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\u003ePremeasured four-stage system reduces setup time and simplifies the tumbling process.\u003c\/li\u003e\n\u003cli\u003e12,000 grit sub micron aluminum oxide polish produces superior shine and improved surface clarity.\u003c\/li\u003e\n\u003cli\u003eGood set of grit sizes included so the kit handles everything from shaping to final polish.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome customers mention labeling and perceived value concerns, so quantity and cost should be evaluated against other options.\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\u003eMJR Tumblers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKit Size\u003c\/td\u003e\n\u003ctd\u003e40 lb kit (premeasured for 40lb tumbler)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoarse Grit\u003c\/td\u003e\n\u003ctd\u003e40 oz 60\/90 silicon carbide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFine Grit\u003c\/td\u003e\n\u003ctd\u003e40 oz 120\/220 silicon carbide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-polish\u003c\/td\u003e\n\u003ctd\u003e20 oz 400\/600 silicon carbide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtreme Polish\u003c\/td\u003e\n\u003ctd\u003e20 oz 12,000 grit sub micron aluminum oxide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompany\u003c\/td\u003e\n\u003ctd\u003eDisabled and veteran owned, Pecatonica, IL, USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Refill Grit Kit with MJR Tumblers' 12,000 grit Extreme Aluminum Oxide Polish is a strong choice for anyone wanting a premium polish without the hassle of measuring. It is particularly valuable for 40lb tumbler owners who want consistent, high-quality results and clear instructions; however, buyers should weigh the kit's quantity and price against alternatives if cost is the main concern.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this kit work in my vibratory tumbler?\u003c\/strong\u003e\u003cbr\u003eYes, the kit is premeasured to work with both rotary and vibratory tumblers designed for a 40lb charge.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the 12,000 grit really make a difference?\u003c\/strong\u003e\u003cbr\u003eUsers report a noticeably deeper shine and improved surface clarity compared with common lower grit polishes, thanks to the sub micron aluminum oxide.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this kit ready to use out of the box?\u003c\/strong\u003e\u003cbr\u003eYes, all four stages are premeasured and include instructions, so you can pour the grits into the tumbler and begin the recommended cycle.\u003c\/p\u003e","brand":"MJR Tumblers","offers":[{"title":"Default Title","offer_id":48184195743963,"sku":"B07F6XZGSM","price":41.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61aeQRPy1vL._AC_SL1080_aef132a1-90ce-434d-bf39-b0c9f2687548.jpg?v=1769574030","url":"https:\/\/gearmusthave.com\/products\/refill-grit-kit-w-mjr-tumblers-12-000-grit-extreme-polish-premium","provider":"GearMustHave","version":"1.0","type":"link"}