This shock comes in a piggyback set-up with an oil reservoir that is fully functional, which reduces the effect of traveling over rough ground and improve ride quality. The damper is for Traxxas HSP Redcat RC4WD Tamiya Axial Wraith SCX10 D90 HPI RC Crawler. It is the best choice for RC hobbyist Features: Made of metal material to upgrade your car's performance TheShock Absorber is 110mm,Hole to Hole Distance is 100mm Fully redesigned and adjusted, high conservation and long durability The shock absorber will greatly reduce the shake and improve the stability For Traxxas HSP Redcat RC4WD Tamiya Axial Wraith SCX10 D90 HPI RC Crawler Any problem, please contact our store without hesitation. Honor to serve you Specifications: Name: Shock absorber Main material: Metal Color: Blue Quantity: 2pcs Total Length: 110mm Hole to Hole Distance: 100mm Hole Size: 3mm Item weight: 41.5g / pcs Suitable for:Traxxas HSP Redcat RC4WD Tamiya Axial Wraith SCX10 D90 HPI RC Crawler Note: Please kindly note that there could be a few deviation as the result of manual measurement. Thank you Package Information: Package size: 16.5 * 6 * 3cm / 6.88 * 2.36 * 1.17in Package weight: 105g Poly bag package Package List: 2 * Shock Absorber 4 * Spring 1 * Screw Set