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Rock GT 50 Quad Roller Skates | RollerSkateNation.com
Vibratory Roller, 50-56", Single Drum Smooth - Rentall Construction
Amazon.com : Sure Grip Rock GT50 Black Roller Skates | Stylish Indoor Skates for Men & Women | Nylon Composite with 62mm Swirl Wheels & ABEC-5 Bearings - Solid, Comfortable and Lightweight (