combination can be moved up and down allowing for the use of simple selection elements two selection systems are provided per combination this enables the number of selection systems with similar machine dimensions to be almost doubled in relation to the known devices the hooks of selection systems of a same combination are movable by one and the same pair of lifting device and each lifting device has at least two parts for being able to engage respective hooks well separated from one another of different selection systems of the same combination application_number US 74593500 A description each combination of two selection systems see fig1 and 5 through 12 comprises a housing 1 with a top part 2 in which a top electromagnetic selection solenoid 3 is incorporated and a narrower bottom part 4 in which a bottom electromagnetic selection solenoid 4 is incorporated on both sides of this housing 1 two hooks 6 7 8 9 can be moved up and down by a respective knife 13 14 the two knives 13 14 can be moved up and down mutually in opposite phase each selection solenoid 3 5 is so disposed in the housing 1 that on two opposite flanks of the respective part 2 4 of the housing 1 this can influence the position of a respective hook 6 7 8 9 in order to select this or not in this specification and in the claims these flanks are indicated by the term selection flanks on each selection flank a projection 9 10 11 12 is provided and each hook has an opening with selection of a hook the.