... 4. Size:1/4"---4" 5. Certification: ISO9001:2008 Ball valve handles: ThreadedBSPT. BSP. NPT. DIN2999Body MaterialCF8M/SUS 316, CF8 ... range: 1/4"---4"Processcasting--machining--cleaning--assembling--cleaning--quality control--packing--transportationTestsTensile strength, yield point, elongation, hydrostatic test, ... such as elbow, nut,union, tee, cross, nippleBusiness typeManufacture Ball valve handles