Sierra International 18-1653 2-Way, 1/4" FNPT Female/Female Shut Off Valve 2-Way, 1/4" FNPT Female/Female Shut Off Valve 2-Way FNPT Size: 1/4" or 6.4mm Sierra Part Number 18-1653 Valve Ends: Female/Female All Sierra parts qualify for and are covered under Sierra's Industry Leading Customer Satisfaction Warranty Before Ordering, Please Verify this is the Correct Part for your Application. For Assistance, Please Call Sierra's Tech Support at 1-877-663-8396