1pcs B132 MXL Timing Belt Closed-loop Belt For DIY Ultimaker Gear MotorSpecification:Material: Rubber Color: BlackDiameter:84.7mmLength: 266mmWidth: 7mmType: Closed-loopFeatures:Smooth transmission、 low noise、 large range of rotationBlack rubber material which is  heat-resistant、 anti-aging and  high strengthTiming Belt  has accurate transmission ratio 、can get the constant speedPackage included:1× Timing Belt