Specification Brand : HARFINGTON BulletPoint1 : Size - Teeth Type: Toothless, Bore: 4mm, Width: 6.5mm, Height: 8.5mm, Outer Diameter: 18mm BulletPoint2 : Material - The timing belt pulleys are made of Aluminum alloy, high hardness and high performance, silver oxide surface treatment, rust and corrosion resistance, and durability. BulletPoint3 : Features - With small friction and high-limit speed, 2GT pulleys are cost-effective and require little maintenance. Apply motor-grade bearings to make sure the pulleys work stably, smoothly and with a longer life. BulletPoint4 : Applications - The aluminum timing belt wheel is widely used in 3D printers, CNC, milling machines, gear forming machines, drilling machines, CNC machine tool lathes, or other mechanical transmission occasions. BulletPoint5 : Notice - Please confirm the size of aluminum timing belt idler pulley before choosing, Color : Silver Tone ExternallyAssignedProductIdentifier : 5281671515146 ExternallyAssignedProductIdentifier1 : 0634562509451 ExternallyAssignedProductIdentifier2 : 634562509451 FitType : Universal ItemName : HARFINGTON 5pcs 2GT Idler Pulley 4mm Bore 18mm Dia. Aluminum Timing Belt Toothless for 6mm Width Belt 3D Printer CNC Machine Accessories, Silver Tone ItemPackageDimensions_Height : 15.9 centimeters ItemPackageDimensions_Length : 1.8 centimeters ItemPackageDimensions_Width : 4.8 centimeters ItemPackageQuantity : 5 ItemTypeKeyword : timing-pulleys Manufacturer : HARFINGTON Material : aluminium alloy ModelNumber : mea220109ee0540 NumberOfItems : 1 PartNumber : hta230703hh000352 ProductDescription : The timing belt pulleys are made of Aluminum alloy, high hardness and high performance, silver oxide surface treatment, rust and corrosion resistance, and durability. Apply motor-grade bearings to make sure the pulleys work stably, smoothly and with a longer life. With small friction and high-limit speed, 2GT pulleys are cost-effective and require little maintenance. The aluminum timing belt wheel is widely used in 3D printers, CNC, milling machines, gear forming machines, drilling machines, CNC machine tool lathes, or other mechanical transmission occasions.