Item Type: RC Guide Shaft Coupler_x000D_ Material: Steel_x000D_ Gross Weight: 50g/1.8oz_x000D_ Color: Silver_x000D_ Inner Diameter: 5mm/0.20in_x000D_ Diameter: Bottom: 22mm/0.87in, cylinder: 10mm/0.39in_x000D_ Small Hole Diameter: 3mm/0.12in_x000D_ Applicable: Motor, hardware, mold, mechanical transmission scene 1Premium Steel: The RC flange coupling is made of premium 45 steel material, which is strong, durable and has long service life. 25mm Inner Diameter: The inner diameter of the RC flange coupling connector is 5mm, which is easy to install and replace. 3Electroplating Process: The heating and electroplating process makes the RC flange shaft coupler strong and insulating, and the impact shaft is more stable. 4Size: The diameter of the bottom of the flange coupling is 22mm, the diameter of the cylinder is 10mm, and the diameter of the small hole is 3mm. 5Wide Application: Wide range of the guide shaft coupler which is suitable for motors, hardware, molds, mechanical transmission scene.5 x_x000D_ _x000D_ RC Guide Shaft Coupler 1 xWrench 10 x MachineScrews