1pcs B132 MXL Timing Belt Closed-loop Belt For DIY Ultimaker Gear Motor Specification: Material: Rubber Color: Black Diameter:84.7mm Length: 266mm Width: 7mm Type: Closed-loop Features: Smooth transmission, low noise, large range of rotation Black rubber material which is heat-resistant, anti-aging and high strength Timing Belt has accurate transmission ratio ,can get the constant speed Package included: 1× Timing Belt