This all inclusive vacuum booster master rebuild kit is great for the do it yourself-er or the person that would like to retain their original case / housing. Also a great option for the out of country customer that does not want to pay expensive shipping to return a core. Keep in mind this will only work on a MIDLAND unit with the removable band. Also be aware that our rebuilt units we sell do not have 100% new parts as shown here as our builder will reuse multiple parts that can be cleaned up and reused. The Bendix unit that was used starting in 1969 was crimped together and requires specialty equipment to take them apart and we do not offer a kit for them.