Befenybay 4 Pcs 3mm to Universal Joint Shaft Coupling With Screws for Motor

【Material】 Universal joint shaft coupling is made of 45# steel, and then electroplated，much stronger, wearproof, durable to use 【Widely Used】Universal joint shaft coupling is produced based on International Flange Standard, widely used in model shaft connection 【Dimensions】Inner Diameter: 3mm to 3mm. Outer Diameter: 9mm. Height: 23mm 【Package Include】4pcs 3mm to 3mm universal joint shaft coupling, 1pcs M3 hex wrench, 8pcs fastening screws 【Function】 Can be used in model airplane boat, robot,RC modelmotor etc