Specifications:
● Product Name: Coupling Joint
● Material: Stainless steel
● Size: 4mm – 3.7m
● Hole Diameter: one hole diameter is 2mm,the other is 3.7mm
● Size: 23x11mm
● Shape: Round
● Color: Silver
● Screw Aperture: M4 transfer
● Product Type: Parts & Accessories
● Net Weight: 11g

Package Include:
1 x 3.17mm to 4mm Universal Joint Connector for RC Boat