Durable construction: high hardness aluminum alloy and galvanized stainless steel spring, resistance to oxidation, rust and wear. Universal fit: rear spring shock absorber, fit for electric scooter 47cc 49CC super Minimoto ATV mini Pocket Bike 250cc PIT PRO PIT Bike Trail Bike Dirt Bike, etc.Strong Load Bearing: Reserve an adjustable knob, which can adjust the spring pressure by itself, and the maximum load is 400 lb. Stable Performance: Helpful for absorbing shock quickly on bad roads to improve safety and make you feel comfortable.Dimensions: Applicable to hole center distance of 90mm/3.54in, total length is approx.110mm/4.33in, The installation opening is approx. 8mm / 0.32in Function: 1. Universal fit: rear shock absorber, fit for 47cc 49CC super Minimoto ATV electric scooter mini Pocket Bike 250cc PIT PRO PIT Bike Trail Bike Dirt Bike etc. 2. Rend