Includes 2 sets of springs which are blue and red. Blue are stiff and red are soft. Also included are four washers and replacement swivel balls and a couple of screws. To help ensure a fit please check measurements below. Measures 100mm long between center of fixing holes. Total length end to end 107mm. Diameter 18.10mm at the widest point. To suit 3mm screws on the bottom and 4mm on the top.