Description: Material: #304 Steel (Harder and Stronger) Length: 110-145 mm / 4.33- 5.71 inch (Optional) Inner diameter: 5 mm / 0.19 inch Outer Diameter: 12 mm / 0.47 inch Steel Constant Velocity Shafts offer the ultimate in torque handling and efficient power transfer Compatible with : 1/10 Scale RC Crawler SCX10 RC4WD D90 Cross Axial SCX10 Truck Package Includes: 1 x Drive Shaft (Size Optional) Note: Check your specific model's manual for compatibility,or Contact us. Size for manual measurement, there may be a 0 to 1 cm error, belongs to the normal phenomenon. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, Thank you!