Guillemin Quick Coupling,guillemin coupling,choke plug with chain 1.Size:3", ... "(Dn80-Dn100) 2.European EN14420-8/NF E29-57 Guillemin Quick Coupling,choke plug,guillemin coupling.choke plug with chain Specifications ... ,VITON6.Casting Technique:Gravity casting7.Usual industrial field used:military,oil,colliery,fire,control,chenmical,industry agriculturalirrigation and other fields8.Size ...