ADDED DATA DOC 61757901.pdf

This is a federal procurement specification for a flexible duct product for U.S. Navy use. The item specified is NSN LLS054340, a 15-inch diameter by 25-foot length flexible duct constructed with 2-ply material in black color with a green heavy-duty bonded wearstrip. The duct must be manufactured from neoprene impregnated poly fabric meeting UL-94-V-0 fire rating standards and feature a steel enclosure wire helix for structural support. The product must be palletized for delivery.

The specification includes mandatory marking requirements for the duct. The text "FIRE RESISTANT PROPERTY OF US NAVY" must be applied via paint stenciling or ink printing in white characters measuring 1-1/8 to 1-1/2 inches tall. These markings must appear in at least eight locations distributed along the entire length and all sides of the duct. When the text appears on a single line, a minimum of 8 to 12 inches of spacing must separate the words "RESISTANT" and "PROPERTY." All markings must be rendered in white color to meet Navy property identification requirements.