Compatible with HPI HSP Traxxas Losi Axial Tamiya 1/10 on-road drift car.Special compatible with Redcat Lightning EP Drift, Lightning EPX PRO, Lightning STK, Lightning STR,HSP 94101 94102 94103, 94122 94123 1/10 on-road drift car Made of high quality aluminum,light weight and durable. Total length: approx 68 mm.;Spring diameter:17mm,Hole center to hole center distance:60mm ;Inner hole diameter: 3mm Easy to install and remove,it will reduce vibration greatly and improve stability as the RC car runs. Pack of 4 piece rc car shocks ; Color:Bule/Red/Black(Optional) Note:Please fill shock oil before use it,and please tighten the screw cap by tool when you filled the oil. Compatible with HPI HSP Traxxas Losi Axial Tamiya 1/10 On-Road Drift Car. Special compatible with Redcat Lightning EP Drift, Lightning EPX PRO, Lightning STK, Lightning STR,HSP 94101 94102 94103, 94122 94123 1/10 On-Road Drift Car Made of high quality aluminum,light weight and durable. Easy to install and remove,it will reduce vibration greatly and improve stability as the RC car runs. Material: Aluminum alloy. Total length:Approx 68 mm Spring Diameter:17mm Hole Center to Hole Center Distance:60mm Inner Hole Diameter: 3mm Color:Bule/Red/Black(Optional) Package includes: 4 x Aluminum alloy Shock absorber