Air hose CoFeatures: Yellow zinc BSPT threads, it working pressure 10 bar, with oil resistant NBR rubber seal Material: Malleable iron Size: 1/4’’—1’’ are two lugs; 1-1/4’’—2’’ are four lugs. Application: Compressed air transfer, connecting pneumatic tools and pneumatic systems, water systems in the industry, at construction sites, agriculture and horticulture.upling & Clamps supplier https://archpipes.com/products/air-hose-coupling-clamps/