2" L x 1" W x 0.5" H; Easily attaches to the wheels of the Thule Spring Stroller to add extra visibility when strolling in low light conditions; Easy clip-on attachment; Highly reflective material adds visibility; Compatible with Thule Spring strollers (sold separately); Limited lifetime manufacturer's warranty; Get help finding the right stroller with the Bloomingdale's Stroller Guide; Imported