These Oerlikon Replacement Rubber Mount (feet) are designed for Leybold Sogevac SV40B and SV65B series rotary vane vacuum pumps. The rubber feet are used to mount, support and (moderately) isolate the vacuum pump. They are bottom tapped for mounting the pump to a base plate. We have included the users manual and parts view for download below (please see parts diagram in the attached document). The Leybold part number is 71212640.