neck portion 5 and a wide bottom portion 6 the wear resistant members 3 are arranged side by side alternately with the neck portion 5 and the bottom portion 6 in the outwardly directed surface 4 if a stone hits one of the wear resistant members 3 having the bottom portion 6 oriented towards the outwardly directed surface 4 the force of the hit will as indicated by the arrow f 1 in fig4 be distributed also over the two neighbouring wear resistant members 3 however if the stone should hit one of the wear resistant members 3 having the neck portion 5 oriented towards the outwardly directed surface 4 the force will not be distributed but only go straight down through the wear resistant lining element as indicated by the arrow f 2 in most cases however the stones hitting the wear resistant lining 1 are so large relative to the wear resistant members 3 that they hit more than one wear resistant member 3 which means that the force will be distributed over a plurality of wear resistant members 3 this reduces the risk of wear resistant members cracking when being hit also in heavy duty applications in addition experiments have shown that the bottle shaped wear resistant members 3 are very safely mounted in the rubber material not until the wear resistant members 3 have been worn down to approximately half the height h they will start falling out of the rubber material if besides the wear resistant members 3 are arranged in such a brickwork pattern with rows 13 substantially parallel to the sectional line ii ii with every second wear resistant member 3 offset in the outwardly directed surface 4 as illustrated in.