The United States Coast Guard is seeking quotations for 50 units of a specific liquid level switch (NSN 6680-01-598-3339), which must be brand name or an approved equal. Vendors must comply with strict packaging, packing, marking, and barcoding requirements per military standards, and provide photos for approval before shipping. The contract will be awarded on an all-or-none basis as a firm fixed price, lowest price technically acceptable. No budget amount or performance location is specified in the description.