Power Systems Versa-Tube Resistance Tube, 48", Single Pops on easily, no Velcro, fits most anyone 3M scotchlite(tm) reflective material Tangerine, yellow and white reflective up to 1500 feet and material is ANSI/ISEA 107-2010 compliant Pink, red, blue, and green reflective up to 500 feet Large 1.25 inches by 14.75 inches; Medium 1.25 inches by 11.75 inches