SIENOC 5PK 2GT 20 Teeth 5mm Bore Timing Pulley Wheel 3D with Grub Screw 3D Printer (5PK Aluminum Gt2 20t Pulley+L Wrench) Go to amazon.com Related posts How to buy the best gt2 pulley 20 teeth? FeatureType: 2GT 20T Pulley Tooth: 20TMaterial: Aluminum AlloyDepth: 16.0mm Height: 16.0mm Width: 16.0mmInner diameter: 5mm Belt Width 6mmOuter diameter: 16mm With 2mm M4 Allen Key Weight:6g DescriptionPackage Included: 5 x 2GT 20T Pulley 1 x Allen Key