*****Description:***** BF CNC Flexible Plum Coupling Shaft Coupler D30 L42 Quantity :1pcs Shaft usage: 10mm X 12.7mm Length: 42mm Diameter: 30mm Sleeve Material:Polyurethane Material: Aluminum Alloy *****Shipping:***** Ship to USA: 7-15 enterprise days Ship to different nations : 10-25 enterprise days