... .gas,some causticity fluid Detailed Product Description:Connect form: ThreadSize: 1/4"∼4".Suitable medium: water, oil, steam, nitric acid, acetate ... standard: PT, NPT, BS21standard, surface is flat, allow overun the range 0.5∼0.8mm.Main material: 304 and 316.Design ... market.Dimension: 1/4", 3/8", 1/2", 3/4", 1"1 1/2'', 2'', 2 1/2'', 3'', 4''PARAMETERS MATERIAL LIST 1"stainless steel ball valve