BLUE Pulley Plastic Gears toy wheels concave dia.29mm TH= 5.8mm Aperture: 3.9mm*FD255 Product Description DIY Plastic Pulley wheel toy wheels small flywheel concave static pulley BLUE NEW Features Material: plastic 100 percent Brand New Diameter: 29mm Thickness: 5.8mm Aperture: 3.9mm Package 10PCS X Plastic Pulley(Blue)