Allows individual height adjustment of the back of the shaft. Made of stretchy neoprene and with reinforced seams. With rubberized inner surface for a non-slip fit. An appropriate number of insert pads are placed between the butt of the rifle and the neoprene cover. Incl. 5 insert pads made of hard foam. Thickness of the inlay pads: 0.3 cm, 0.6 cm, 1.0 cm, 1.3 cm, 1.6 cm. Length of the shank back elevation: 17.8 cm.