Item: 8x8 D25 L30 BR Series Aluminium Flexible Coupling Shaft Coupler CNC Stepper Motor d1xd2 : 8x8 mm Outer Diameter:25 mm Length:30 mm Body Material : Aluminum Alloy Pls kindly note: here is 5 pcs/lot. If you desire to purchase other size which the goods isn't always in our store pls touch us; Special Bre Size And Slot Available On Request. Delivery: The goods will be sent in your address. Please make certain your handle is correct. Feedback: We sincerely present nice products and perfect service, so if you are convinced with us, please leave your positive feedback, clients delight and supportive is our greatest return If there's anything that you are not satisfied with our item, please tell us so we will assist clear up the problems. Please don't depart a adverse feedback. Thank you so much.