Regulator Inlet Nuts Argon; Helium; Nitrogen Plastic CGA-580 Western Enterprises Regulator Inlet Nuts WARNING: This product can expose you to Lead a chemical known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov Material: Plastic Color: Black Thread Direction: RH Gas Type: Argon; Helium; Nitrogen Connection Type: Male Style: Regulator Hand-Tight CGA No.: CGA-580 Wt.: 0.14 lb