PSS Type A Maintenance Kit, PYI Inc PSS Shaft Seal bellow maintenance kit for world market leading dripless mechanical face seal. Includes rubber bellow (1), O-rings (2), set screws (5), thread lock tube (1), hose clamps (4), Allen key (1). Preventative maintenance recommendation based on replacement standards for rubber products below waterline. Certified by ABS, BV (or Bureau Veritas), RINA, and US Coast Guard approved. Manufactured in the USA.