This is a solicitation for the manufacture of a valve seat, requiring strict adherence to military and quality standards, including ISO 9001 and mercury-free materials for use on submarines or surface ships. The government intends to include an option to increase the quantity of supplies, which can be exercised within 365 days from the date of award. Proof of authorization as a distributor from the original equipment manufacturer is mandatory for offerors. Government source inspection is required, and all freight terms are FOB Origin.