How many oz is in each container?

1 Coarse-16oz. 2 Medium-13oz. 3 Pre-polish-12oz. 4 Polish-11.5 oz.

I just opened this and finished with grit one, went to put grit 2 in and bottle open and 1/2 full. How do I contact seller?

I would go through Amazon to get an answer for your problem.

Can it be used together ?

Each grit is a different fineness intended for a specific purpose. We do not recommend using them at the same time. We do recommend 1 TBS grit per per 1 LB rocks, at each cycle. For further information please contact us at help@natgeotoys.com.

After each step for the rocks in the kit, my rocks dry with a dull white finish. It doesn't show when it is wet. Am I doing something wrong?

No. I find that after tumbling with the finest grit after the last step... and thoroughly allowing the rocks to dry, a nice coat of wax or oil brings out the color beautifully.

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Description

✨ Turn rough stones into polished treasures — your creative edge awaits! ⚡

UNIVERSAL COMPATIBILITY - Seamlessly works with all rock tumblers, but optimized for National Geographic tumblers for flawless results.
PRECISION POLISHING POWER - Four distinct grit stages sculpt, smooth, pre-polish, and shine your stones to museum-quality brilliance.
AWARD WINNING QUALITY SUPPORT - From the Toy of the Year-winning Blue Marble team, backed by expert U.S.-based customer service.
BULK SUPPLY FOR SERIOUS CREATORS - Over 3 pounds of premium grit lets you transform up to 20 lbs of rocks, gems, or glass—perfect for your next big project.
EFFORTLESS MEASUREMENT STORAGE - Includes a 10 mL scoop and secure containers to keep your grit fresh and your workflow smooth.

The National Geographic Grit Refill is a premium 4-stage silicon carbide grit kit designed to polish up to 20 lbs of rocks, gems, and glass. Compatible with all rock tumblers and optimized for National Geographic models, it includes over 3 pounds of grit, a precision scoop, and secure storage containers. Developed by an award-winning team, this refill pack delivers professional-grade results for STEM enthusiasts and creative hobbyists alike.

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€ 345.85

Duties & taxes incl.

Netherlandsstore

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Educational Objective(s)	STEM
Language:	English
Model Number	NGBULKGRIT
Number of Game Players	1
Assembly Required	No
Batteries Required	Yes
Batteries Included	No
Material Type(s)	quartz glass carbide
Remote Control Included?	No
Colour	white
Product Dimensions	13.97 x 13.97 x 10.8 cm; 1.78 kg
Item model number	NGBULKGRIT
Manufacturer	National Geographic
Item Weight	1 kg 780 g

National Geographic Grit Refill for Rock Tumbler - Works with National Geographic

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