according to the drawing or samples,material: aluminum,Stainless steel,carbon steel,it can be made from pipe and by casting 1.Product Name: Crimp Ferrule2.Material: Stainless Steel,  Steel,  Aluminium3.Size: DN020,  DN025,  DN032,  DN040,  DN050,  DN065,  DN080,  DN100 

Crimp ferrule can be used in a wide variety of applications that benefit from increased coupling retention and a higher assembly working pressure rating. 

hose Ferrule and sleeve