SpecificationsRussia couplings 1.Storz type coupling 2.Made of aluminum 3.Many sizes avaiable:1" 1-1/2" 2" 2-1/2" 3" .4" 4.Packing by cart Storz Coupling(Russia couplings)Storz Coupling(Spool Adapters,Website:://.lifestylecasting.com,fire hose coupling)