uxcell 5 Pcs Plastic 29mm Diameter 6mm Thickness DIY Gear Band Pulley Red Country of Manufacture: CHINA; Material: Plastic Net Weight: 11g; Package Content: 5 x Rubber Band Pulley Main Color: Red; Product Name: Band Pulley Fit Rubber Band Width: 4mm(0.16"); Size: 29mm x 6mm/1.14" x 0.24"(D*T) Fit Shaft Dia: 4mm(0.16")