Description Transmission is accurate no slip at work with a constant transmission ratio Smooth transmission with a buffer shock absorption capacity low noise Easy maintenance no lubrication low maintenance costs Bracket structure design fixed hole position can be adjusted motor 4 fixed screw position thereby adjusting the size of the belt between the synchronous wheel elastic Specification Model 509712Color BlackMaterial Surface oxidationGear of Wheel 48 toothGear of Motor 16 toothBore of Wheel 22mmBore of Motor 8mmRound Hole Diameter of Bracket 18mmBracket Width 9mmBracket Length 112mmBelt Width 10mmBelt Length 225mmScrew of Wheel 5Screw of Motor 1Screw of Bracket 5Package Included 1 X Pulley for Wheel1 X Pulley for Motor1 X Bracket1 X Belt11 X Screws