Walker Coaster design replaces tennis balls wheels and rubber tips on walker legs Coasters glide smoothly over doorways sidewalks and carpets Walker Coasters fit standard 1 tubing No tools required for assembly Bright and easy to see color Smooth and durable plastic Glides easily over cement carpet or linoleum floors Slides in all directions Unique O-ring helps coasters stay snug to walker legs in all temperatures Protective shields prevent coasters from getting stepped on becoming caught in doorways/thresholds collecting water dirt debris Color: Tennis Ball Yellow Polybag with header card