Specification Brand : SUOFEILAIMU-PHONE CASE BulletPoint1 : Material: Iron Plating BulletPoint2 : Metal joint suited to use direct axis motor, suitable for model cars, model ships, robots, and other metal adapter to use. BulletPoint3 : "10mm-12mm" means "one hole diameter of the coupler is 10mm ,the other is 12mm" BulletPoint4 : Universal Joint Outside Diameter: 20mm BulletPoint5 : Universal Joint Length: 52mm ExternallyAssignedProductIdentifier : 8306045366890 ItemName : SUOFEILAIMU-PHONE CASE Metal Coupler 10mm/12mm-12mm Shaft Coupler for Motor Connector Metal Universal Joint Coupling (Inner Diameter : 10mm 12mm) ItemPackageQuantity : 1 ItemTypeKeyword : pin-and-block-universal-joints Manufacturer : SUOFEILAIMU-US Material : Metal MetalType : Carbon Steel NumberOfItems : 1 PartNumber : SUOFEILAIMU-123 ProductDescription : Side Screw Fixing Hole: M5 Package Included: Universal Joint x 1 Screw x 4 Spanner x 1 ProductSiteLaunchDate : 2021-04-01T06:29:08.150Z Size : 10mm 12mm Style : Manual