#1 = Gast 1550, belt Drive. I think this is 14 CFM rated for 20". Asking $300 #2 = Gast 0322 direct drive. This is 4 CFM and rated for 26". Asking $175 #3 = Gast 0322 (probably, label is missing) direct drive. This should also be 4 CFM and rated for 26" Asking $175 #4 = (not pictured) Gast 3040 belt drive mounted on a big awkward stand. 31 CFM and rated for 20" This one needs a motor. Asking $250 I also have other Gast pumps that are less complete if anyone is interested in a project. Located in Raymond NH but I cal also bring them to Wilmington MA on weekdays if that is better for you. OK to text (603)300-6837