1/4" NPT, Female, H Style, Coupler, 3/8" Flow Size, Maximum Of 300 LB Per SQIN, Maximum Air Flow Of 67 Standard CUFT Per Minute, Maximum Temperature Of 250 Degrees Fahrenheit, Steel Plated To Resist Rust, Body Has 6 Locking Balls For Better Retention Of Plug, Compatible With 1/4" x 3/8" I/M Style.