Lotus Seals has dealed many normal types of standard mechanical seals for a long year like "Burgmann, Johncrane, Flowserve, Roten, Chesterton, AES, Nippon, Etc"The careful selection of materials and strict quality control ensure a long use life. It is around 3 years for water pumps, even longer. We hold large stocks for them as well. That means we are able to provide fast lead time.