uxcell 5 Pcs Plastic 29mm Diameter 6mm Thickness DIY Gear Band Pulley Blue Country of Manufacture: CHINA; Material: Plastic Net Weight: 10g; Package Content: 5 x Rubber Band Pulley Main Color: Blue; Product Name: Band Pulley Fit Rubber Band Width: 3mm(0.11"); Size: 29mm x 5.8mm/1.14" x 0.23"(D*T) Fit Shaft Dia: 4mm(0.16")