Push Button Switch2PDT Latching Manufactured Specifically For Professional Audio Suitable for replacing any 2 pole switch except in interlocking assembliesReplaces 2 Pole switches in Carver, MXR-130, PCB No's.:NRS-511; PA-509 NOTE! If switch is to be used in an assembly, remove blue collar. If used as a stand alone, leave blue collar on. If you purchase any other of our products beside this one. Please "request total from seller" so we may more easily combine shipping. Acclaimed Products, Inc. (banzerg) is a veteran owned and operated small business located in Ashtabula, Ohio