Features: two spring rates included CNC machined Aluminum Damping Shock Absorber Telescopic design for maximum travel Threaded shock bodies for quick pre-load adjustments Scale-looking reservoir (Can be filled with 2/3 shock absorber oil) Specifications: Extended length hole-to hole: 40.5mm / 1.59in Compressed length hole-to hole: 39.5mm / 1.55in Spring Length: 32mm,13 Turn (0.4/0.5mm) Suit for: Axial SCX24 or other mini/micro crawler car What's Included: 2 PCS Dual Spring Shocks/2 * Spare Spring 4 PCS Dual Spring Shocks-4 * Spare Spring Different colors for your options.Any problem, please contact our store without hesitation.Honor to serve you.