Image Air Brake Insert Markets Transportation Jump to Section Product Options Related Products Product Options Part Number Length Tube Size OD Material 63NAB4 .53" 1/4" .163" 302/304 Stainless Steel 63NAB6 .64" 3/8" .245" 302/304 Stainless Steel 63NAB8 .81" 1/2" .370" 302/304 Stainless Steel 63NAB10 .86" 5/8" .434" 302/304 Stainless Steel 63NAB12 1.04" 3/4" .559" 302/304 Stainless Steel Related Products Image Air Brake 45° Elbow Image Air Brake Female Connector Image Air Brake Male Branch Tee Image Air Brake Male Connector Image Air Brake Nut Image D.O.T. Air Brake Tubing