vacuum:0.065-0.08Mpa flow rate:25-30L/Min noise:50db(A) volume:2L(stainless steel) voltage: 12V,24V,36V, ... bus and other braking powers, distinguishing features of good durability, low noise, maintenance-free, good durability, and so onvacuum:0.065-0 ... steel)voltage: 12V,24V,36V,48V etc vacuum pump brake booster