YSS accessory rear shock absorber. Type: gas Upper mount: Eyelet Inner eyelet diameter: 12 mm Length: 380-390 mm Bottom mount: Eyelet Inner eyelet diameter: 12 mm Adjustment: spring back tension (stepless) Spring colour: Black Spring characteristics: 55 Spring length: 240 mm Spring diameter: 46 mm Manufacturer: YSS Piston diameter: 36 mm Bar diameter: 16 mm