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Fisnar CR570 Metal Cartridge Retainer is a durable, heavy duty, high-grade anodized aluminum retainer designed for safely dispensing pressure of up to 100 psi (6.9 bar) in industrial settings. It seals directly onto the inside of the inserted cartridge, allowing for enhanced performance. Designed for use with Techcon, Semco, and Nordson EFD 20 oz plastic cartridges. Includes retainer, caps, seals, and hose. 20 oz.