Product Name: 316ti Multi-Layers High Pressure Bellows Assembly for Valves Model NO.: bellows for valve Head Type: Round Surface Treatment: Without Treatment Connection: Welding Material: Stainless Steel Standard: GB Trademark: Aidi Transport Package: Carton Package Specification: DN16-DN89 Origin: China HS Code: 7307220000 Product Description Jiangsu Aidi -professional manufacturer about bellows assembly used for valves,multi-layers and high pressure,material have 304,316L,321 , 316Ti and H.C 276.AiDi can design,only you provide pressure ,diameter of stem and movements of your products.