Gibson Taiwanese Block Chalk is preferred over Chinese chalk because of its "grippy" qualities. Grip is everything when swinging a 1.5" wood or steel rail.
Ader Gym Chalk (8 - 2 oz Blocks) : Sports & Outdoors
Climbing Chalk in Climbing & Mountaineering Equipment - Walmart
Gibson Athletic Premium Block Gym Chalk. Magnesium Carbonate
Gibson Athletic Premium Block Gym Chalk. Magnesium Carbonate
Premium quality block chalk for gymnastics, weight-lifting and Rock Climbing. Also used in rosin bags for baseball, on barbells, weight bars, parallel
Great Lakes Sports Case of Gym Chalk Made from 100% Magnesium Carbonate (1 case = 36 pounds)
Gibson Athletic Premium Block Gym Chalk. Magnesium Carbonate – RAGE Fitness
Top Sport on Instagram: Magnesium carbonate Chalk Blocks
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Rage Fitness Gibson Athletic Premium Block Gym Chalk - 2oz Block, White (2 Oz. Block) : : Sports & Outdoors