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