This is a presolicitation for a valve disk, with a required delivery schedule of 338 days after receipt of order. The place of performance is currently unknown. The government intends to solicit only approved sources, specifically VACCO Industries, for the specified part numbers, with a total quantity of six units. All responsible sources may submit an offer, with the final award based on a combination of price, delivery, and past performance. The solicitation will be available on or after a specified date in April 2026.