Direct air line chucks have a built-in shut-off valve and therefore cannot be used on iator gauges. Use when air supply lines come directly from the compressor with no other valve in the line. 1/4" Female NPT and 150 PSI maximum air line pressure. Cannot be used on iator gauges150 PSI maximum air line pressure1/4 inch female NPTBuilt in shut off valveModel # 17-395.
