White nylon plastic with a matte finish and slight grainy feel.
About this Product
Replace a 3x3 core with this core to make it a different puzzle. Turns a 3x3x3 into a 3x3x4, turns a 3x3x5 into a 3x3x6, and turns a 3x3x7 into a 3x3x8. Requires a screw, spring, washer, and bolt to assemble.