The model 3000-DC decrimper is recommended for most aluminum can valves only. It is supplied with 1 collet of your choice. The stock collets are sized upon valve pedistal size. Sizes available are .410, .430, .480 and .500 It can decrimp 10 cans a minute depending on the operator. With the use of a special spacer adaptor some bottle valves can also be decrimped. The only maintence required is a dab of grease on the outside of the collet.