Comparison : Item # B3540-41300BA1W, Aluminum Liquid Level Gage with Shut-Off, 13” Centerline, Front Mount 1/2"-20
Item # B3540-41300BB1W, Aluminum Liquid Level Gage with Shut-Off, 13” Centerline, Back Mount 1/2"-20 with Nuts
Item # B3540-41300BN1W, Aluminum Liquid Level Gage with Shut-Off, 13” Centerline, 1/4" Male NPT Adapters
Item # B3540-41300BN2W, Aluminum Liquid Level Gage with Shut-Off, 13” Centerline, 3/8" Male NPT Adapters
Item # B3540-41300BN3W, Aluminum Liquid Level Gage with Shut-Off, 13” Centerline, 1/2" Male NPT Adapters