Item: 6.35x14 D28 L30 BR Series Aluminium Flexible Coupling Shaft Coupler CNC Stepper Motor d1xd2 : 6.35x14 mm Outer Diameter:28 mm Length:30 mm Body Material : Aluminum Alloy Pls kindly note: this is 5 pcs/lot. If you prefer to purchase other size which the products isn't in our store pls contact us; Special Bre Size And Slot Available On Request. Delivery: The goods might be sent in your address. Please make certain your address is correct. Feedback: We sincerely present good products and perfect service, so while you are satisfied with us, please go away your positive feedback, prospects delight and supportive is our best go back If there is anything that you are not convinced with our item, please let us know so we will help clear up the problems. Please don't go away a damaging feedback. Thank you so much.