This is a contract for the manufacture of a liquid level sensor for Navy submarines and surface ships, with a mandatory requirement that the item contain no metallic mercury and be free from mercury contamination. The performance location is not specified, but any change to the production facility requires written approval from the Contracting Officer and must include a $250 price reduction to cover administrative costs. The item must be manufactured to the design represented by Cage Code 6XTK9 and reference number 003-00017. Only authorized distributors of the original manufacturer's item will be considered for award and must provide proof of authorization with their offer.