Amazon.com: AI-YUN 2x3x3 Cylinder Speed Cube 2x3x3 Barrel Cube 2-Layered Round Column Magic Cube Puzzle Toys Brain Teasers for Adults and Kids : Toys & Games
Tony Fisher's 7x7x7 Barrel ( Rubik's Cube type puzzle )
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Calvin's Lite-Super Barrel Cube – TheCubicle
Barrel cube, The Ultimate Guide! - YouTube
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