Specification Brand : Mxfans BulletPoint1 : Diameter: 31mm, aperture: 7mm, thickness: 15mm, shaft size: 16x6mm (Dia x Height). BulletPoint2 : Timing belt: 3-5mm PU round belt. BulletPoint3 : Normally used as powerless spindle in DIY small drilling machines, milling machines, small lathes. Color : Silver Department : Unisex Adult ExternallyAssignedProductIdentifier : 7341560848347 ItemName : Mxfans 7mm Hole Diameter V-type Step Pulley Wheel Fit with 3-5MM PU Round Belt ItemPackageDimensions_Height : 6.2992 centimeters ItemPackageDimensions_Length : 1.8034 centimeters ItemPackageDimensions_Width : 5.588 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : v-belt-pulleys Manufacturer : blhlltd Material : Metal ModelName : DNAFIMUO ModelNumber : DNAFIMUO NumberOfBoxes : 1 NumberOfItems : 1 NumberOfPieces : 1 PartNumber : M3181024047 ProductDescription : Features: 1.Each qualify checked item with a unique Manufacturing Part Number label on the inner package to confirm if it is the authentic item sold from our store. 2.When you have any problems about your item, please send us the MPN label information first. 3.Diameter: 31mm, aperture: 7mm, thickness: 15mm, shaft size: 16x6mm (Dia x Height). 4.Timing belt: 3-5mm PU round belt. 5.Normally used as powerless spindle in DIY small drilling machines, milling machines, small lathes. 6.Package content s a V-type step pulley,two accessory screws and a wrench.