Features1 enhancement to most bikes,like mountain bikes,e-bikes,electric scooter,etc. 2Integrated oil spring structure,more stable shock absorption. 3Aluminum alloy material,light weight to reduce the burden of riding. 4 performance: reduce vibration and noise.SpecificationFeatures: enhancement to most bikes,like mountain bikes,e-bikes,electric scooter,etc.Integrated oil spring structure,more stable shock absorption.Aluminum alloy material,light weight to reduce the burden of riding. performance: reduce vibration and noise.Specification:Model: 125mm*850lbs / 150mm*1000lbs / 165mm*750lbs / 165mm*1000lbs (optional)Material: Aluminum alloyLength (eye to eye)125mm150mm165mm165mmPounds850lbs1000lbs750lbs1000lbsStorke18mm29mm42mm42mmInstallation Aperture8mm8mm8mm8mmBushing Size (outer diameter*length)24*18mm24*18mm24*18mm24*18mmWeight258g330g335g343gPackage weight: approx. 278 - 363 g / 9.8 - 12.8 ozPackage List:1* Shock Absorber2* Bushing4* ScrewNOTE: Please measure the size of your shock for matching before buying.Package List1* Shock Absorber2* Bushing4* ScrewNOTE: Please measure the size of your shock for matching before buying.