NJ Phillips Major Service Kit for 5ml Vaccinator is a comprehensive repair kit designed to maintain and restore the performance of your 5ml vaccinator PAS34. The kit includes essential replacement parts such as a head seal washer SH45, delivery valve washer SF4, cup support washer SN56, cylinder SH14, inlet valve washer SF4, additional cup support washer SN56, and piston seal ring SP323, providing everything needed for a thorough service and reliable operation.