Aluminum helloc hose,guillemin coupling,aluminum guillemin coupling 1.Size:11/2",4"( ... /NF E29- Guillemin Quick Coupling,guillemin coupling.aluminum helloc hose,Male helloc hose end Specifications: 1.Technical Standard :European EN14420-8/NF ... Technique:Gravity casting7.Usual industrial field used:military,oil,colliery,fire,control,chenmical,industry agriculturalirrigation and other fields8.Size:11/2 ...