Planet Bike Strap for Spok Bike Lights Replacement hook and loop strap or additional strap for Planet Bike's Spok bike lights (original version - model #s 3042, 3042-1 & 3043 Strap quickly and securely mounts Spok bike light to multiple locations without tools The strap allows the Spok bike light to mount to everything including helmets, handlebars, hubs, saddle rails and seat posts. Dimensions: 6.5 inches x .5 inches