Diaphragm - Nitrile - Size 4 (14.75" Diam) (113N-4)

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This replacement Size 4 diaphragm is for Edson's Heavy Duty Pumps for all Model 134 pumps (prior to 1995). The diaphragm is made from Nitrile, an elastomer with very good dynamic strength and is highly resistant to the effects of oils and general waste products.