The AFTC-6411-25MM-33M is a 25mm diameter round mechanical seal. It is designed to fit standard ANSI, American National Standards Institute B73.3, class III, and ANSI B16.5 type class 150 and 300 flanges. This seal features a molded black nitrile rubber, O-ring design and a flat molded surface for ease of installation. It is resistant to most oils, chemicals and water. Its maximum operating temperature is 250°F, and its pressure rating is up to 300 psi. The AFTC-6411-25MM-33M is a reliable product for sealing applications requiring an economical and durable solution to wet or dry applications.