Stupidbright SB Series Rubber Rings for Handle Bar Mount - 2 x Rubber Rings: Small & Large. UNIVERSAL FIT ON ANY BIKE: 1 Large & 1 Small Rubber Bands Stretches and Fits on any bicycle FITS ALL CREE POWERED BIKE LIGHTS: Many Cree Powered Bicycle Light Uses The Same Mount. These Rubber Bands Works On All. Stupidbright SB SERIES, Magicshine, Gemini SECURED FIT: Rubber Sticks & Won't Allow Your headlight Movement While Riding STUPIDBRIGHT&trade; LIFETIME WARRANTY: No Hassle No Question Lifetime Warranty