PRODUCT: Mountain Bike Shock, A variety of pounds to choose SIZE: 125mm(5″), 150mm(6″),165mm(6.5″),190mm(7.5″) BUSHING: length is: 24 x 24mm, inner diameter of eye is: 8 x 8mm COMPATIBLE: MTB, XC Soft tail, electric, Scooter, Folding Bicycle MATERIAL: high-quality steel, anti-fracture,Extended service life Size:450 Lbs | Color:125mm MTB SHOCK DESCRIPTION: Name: Mountain Bike shock absorber Length: 125mm(5″), 150mm(6″), 165mm(6.5″), 190mm(7.5″) Bushing length is: 24mm Inner diameter: 8mm Spring Rate: 450 Lbs , 650Lbs , 750Lbs , 850Lbs , 1000Lbs , 1500Lbs , 1800 Lbs , 2000Lbs Compatible: DH, XC Soft tail, electric bikes, MTB, Scooter, Wheel Chair, Folding Bicycle. With upper and lower bushing screws Feature: High strength and durability, Improved shock absorption performance. Reduce bumps. Weight: approx 480g – 1000g SUITABLE WEIGHT: 450 Lbs: suitable weight: 30~50kg 650 Lbs: suitable weight: 50~60kg 750 Lbs: suitable weight: 60~70kg 850 Lbs: suitable weight: 70~90kg 1000 Lbs: suitable