GY6 Rear Shock Absorber 49cc 50cc

Overall Length: 330mm / 13."
Distance between mounting holes (Center to center): 318mm / 12.5"
Top Mounting Hole Diameter: 10mm / 0.39"
Diameter of Bottom Mounting Hole: 8.5mm / 0.33"
Width between Top Mount Holes: 22mm / 0.87"
Width of Bottom Mount Hole: 28mm / 1.1"
Greatest Outer Diameter of Spring (approx.): 41mm / 1.6"
Spring Rate: 300 lbs/in.