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Designed for use with Welch Ilmvac™ air filters.
Designed for use with CRVpro Rotary Vane Vacuum Pumps. Welch Ilmvac™ Aluminum KF Inner Centering Rings feature a replaceable Fluoroelastomer O-ring seal.
O-Ring for Stainless Steel Three-Way Valve is made of silicone.
Diameter: 28 mm