These couplings can use with fire vehicles, fire hydrants and fire pumps, high pressure water hoses & fire hoses, and they are ideal for hotels, tall buildings, warehouse and docks fire-fighting. Descriptions: 1) Material: a) Body: Brass alloy; b) Seal: Nitril black rubber; 2) Standard available: Storz / ANSI / John Morris / Machino / Nakajima. 3) Pressure durable: a) Working pressure: 1.6mpa; b) Strength test pressure: 2.4mpa. 4) Characteristics: a) The Jet Stream Nozzle enables to choose full jet from the shut-off position. b) Strong cooling with little water consumption through instantaneous substance. c) Simple, reliable design, insensitive to dirt, very easy cleaning through changeover to full jet. d) Large throw distance and fine atomizing body. e) Corrupt resistant, break resistant, equality spray. 5) Size available: 1-1/2" , 2" , 2-1/2" , 3/4"&1" ( only for FL-QZ-085 ) 6) Quality Certificates: ISO9001:2000 & CCCF 7) All of them are of excellent quality & competitive quotation for you. And we always promise speedy delivery. We are the qualified member of NFPA .