This is a sole-source procurement for 27 units of a Valve, Relay (Part Number C188.0146.00) from Cometto SPA. Delivery is FOB origin, and the part requires engineering source approval to maintain quality, with the approved source retaining essential data and manufacturing knowledge. The government intends to negotiate only with Cometto SPA, but interested parties may submit quotes or express capability prior to award. No specific budget amount or performance location is mentioned in the description. The opportunity is for spare replenishment under NAVSUP Weapon Systems Support.