Price Item Use the form below to price this item with available options. Note: in some cases a list price may not be available for the specific options you select. Select Part Number: Select Part # Size 60503B-EXT 2" 10GPM 60504B-EXT 2" 15GPM 60505B-EXT 3" 20GPM 60506B-EXT 3" 25GPM 60507B-EXT 3" 35GPM 60508B-EXT 3" 50GPM