We produce tee with good quality and competitive price. And the size is Seamless:from 1/2" to 24" Welded:from 24" to 96"( or as customer requirements); the material is Carbon steel(ASTM A234 WPB,A234 WPC,A420 WPL6.ect) Stainless steel(ASTM A403 WP304,304L,316,316L,321.ect)Alloysteel(ASTMA234WP12,WP11,WP22,WP5,WP9,WP91,ect) and the thickness is SCH60, XS, SCH80,SCH100, SCH120,SCH140,SCH160, XXS. all the production process are made under the ISO 9001:2000 stictly.