This shock absorbers fit most Chinese 50cc 70cc 110cc 125cc 140cc 160cc Pit bike Dirt Bike Gokart Moped Quad and Scooter. This is also for those who upgraded the stock 50s with aftermarket H style swingarm. 290mm (12″) total length 270mm (10.5″) Length of eye to eye. Eye Diameter (Bushing): 10mm (0.4″) Eye thickness : 2.00mm (0.8″) Spring thickness: 11mm (0.43″) Spring Width: 70mm (2.76″) The eye of shock has tensile strength more than 2,000 Kgf Spring Weight: 800lb Package: 1 pcs