◆ This universal joint is made of steel. ◆ 1 Piece of Steel Connector Universal Joint. ◆ Material steel. ◆ There are two sizes for your choose, 3x3.175mm / 4x4mm, and 3x3.175mm is suitable for FT012, 4x4mm is suitable for FT011.
This product would be ideal for RC boat enthusiasts who require a 3mm to 3.175mm Steel Universal Joint Coupler for 4mm to 4mm connections.