has a first restriction restricting edge 7f the second valve element 8 is mounted for longitudinal movement in a second fixed internal wall 11 in the space 3 the valve element works towards a seat 9a in the first fixed internal wall 9 the seat forms an integral part of a passage 9b in the wall 9 via a second restriction 12 formed by the element 8 and the seat the passage 9b connects the space v1 with a third space v3 the element 8 is in the form of a needle pin with 2 3 mm diameter for example its end surface 8a has an area which is hereinafter referred to as the 34 needle area 34 the valve element 8 forms an integral part of or interacts with a proportional magnet 13 which is in the space 3 the magnet includes an armature 13a which is connected or interacts with the needle or pin 8 the interaction between armature and pin 8 takes place via a peg or contact part 13a 39 on the armature the magnet includes a bobbin having a winding case 13b and a winding 13c the bobbin is surrounded by an iron cover 14 arranged to amplify the magnetic field which is produced by the proportional magnet when an electric signal i is supplied to the winding 13c the control signal i is supplied via electrical conductors l1 and l2 which connect the windings to external control elements 14 14a the wires are arranged in a channel 15a inside the piston rod 15 the channel forms a gastight connection in relation to the surroundings of the shock absorber the piston rod is fixed in the.