The United States Coast Guard is seeking quotations for 25 units of a specific liquid level switch (part number 549018-4466), which is a replacement for the GEMS brand sensor used on FRC vessels. The required switch must meet detailed specifications, including a 2 PSI gage pressure type, 4/20mA output, and a 1/2" NPTM electrical connection with a 20-foot cable. Vendors must provide photos of packaging, packing, and marking (PP&M) for approval before shipping, and items must be individually packaged per MIL-STD-2073-1E Method 10 in double-wall fiberboard boxes. Award will be made on a lowest price technically acceptable basis, and the brand name part is mandatory unless an equal product is approved by the Coast Guard. No budget amount, performance location, or non-bid timeline is specified in the description.