K.8.1 Machines shall be marked with the IP number according to the degree of protection against ingress of water other than IPX0. If the first numeral for the IP numbering is omitted, the omitted numeral shall be replaced by the letter X, for example IPX5.Grass trimmers, brush cutters and brush saws shall be marked with the maximum speedof the spindle assigned by the manufacturer.The cutting head for grass trimmers and the cutting accessories for brush cutters andbrush saws shall be marked with their maximum permitted rotational speed.Compliance is checked by inspection.