The STX 46 is a monotube high pressure gas type shock absorber 46mm piston diameter with a internal reservoir. Comes with adjustable preload and R1 rebound damping adjustability. Complete with installation instructions. - Yellow spring - Clear body - Single tube - Piston diameter: 46mm - Monotube high pressure gas type of shock absorber with external ''piggy back'' reservoir - Adjustable rebound damping with adjuster wheel above the end eye - Adjustable compression damping with adjuster wheel or slot on reservoir- Adjustable hose mounted hydraulic spring preload adjuster - Length: 398.5mm - Stroke: 80mm - Rate N/mm: 100 N/mm - Mounted spring: 962261 (00698-34). Note: Check your local MCS dealer or the MCS sales department for exact type of approval and validity on bike model and years on the test report.