Cobalt Series Dummy Plug

Dummy plug for Cobalt Series bulkhead connectors. Requires a spare Cobalt Locking Sleeve (sold separately) to hold it in the bulkhead connector. Made from black acetal, rated to 600m depth. Includes O-ring and stainless steel retaining ring. The retaining ring is a new feature introduced in June 2022. It can be used to keep the dummy plug and the locking sleeve (sold separately) together.