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 80mm long between center of fixing holes. Total length end to end 88.5mm. Diameter 17.80mm at the widest point. To suit 3mm screws on the bottom and 4mm on the top.