This hose is 50 ft long and has a 3/8 in inner diameter. It's equipped with MPT fittings at both ends and accepts 1/4 in FPT fittings. You may not combine 25 or 50 ft lengths of the 3M™ Supplied Air Hose W-9435. Supplied air respirators require a source of clean breathing air such as plant air systems, low pressure pumps or bottled air. Complete systems include a supplied air hose, an air regulating valve, a breathing tube and a helmet, hood or other face piece. Potential benefits include A cost-effective way to provide a high level of respiratory protection, 3M™'s range of supplied air valves can cool or heat air by up to 50 deg F (28 deg C), no filters, cartridges or batteries to maintain, supplied air provides no additional breathing resistance to the wearer.

3M™, 7000005373, Straight Hose, Series: W-9435, 3/8 in Diameter Hose, 50 ft Length, Black/Blue, Rubber, For Use With: 3M™ Versaflo™ V Series Supplied Air Valve

• MPT fittings at both ends and accepts 1/4 in FPT fittings
• Supplied air respirators require a source of clean breathing air such as plant air systems, low pressure pumps or bottled air
• No filters, cartridges or batteries to maintain
• Available with various fittings

• https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/1040_800284CA_V3.pdf https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/1040_800284CA_V3.pdf