Described is a needle assembly magazine (1) comprising a housing (2) adapted to contain a plurality of needle assemblies (3.1) and a slider (5) movably disposed within the housing (2). The housing (2) has a first opening (2.3) providing access to an unused needle assembly and a second opening (2.4) for receiving into the housing (2) a used needle assembly. The slider (5) separates the housing (2) into a first region for unused needle assemblies and a second region for used needle assemblies. Movement of the slider (5) advances the unused needle assemblies within the housing (2) toward the first opening (2.3).