Our website: alsafegascylinders point com I'm shirly bai. You can write me to the following address: shirlybai at alsafegascylinders point com Outside surface treatment: transparent painting Thread: 3/4-16unf Valve: cga870, cga870-1, cga870-2 Form a, form e avaliable. Features: èmade by aluminum 6061; è40% lighter than steel cylinders; èno magnetism; èhigh corrosion resist and special inner surface treatment, ensure medical oxygen clean and smelless, ideal for medical oxygen storage; èstable performance; èwidely used in hospitals, rescue stations, home oxygen therapy, etc. èchoice of worldwide top brands and enterprises. We can also produce other specifications according to your requirement. Quality & safety 1. We have established the quality guarantee system according to the requirements for boiler and pressure vessel manufacturing licensing of china and obtained the certificate issued by general administration of quality supervision, inspection and quarantine of the p.R.C (aqsiq), qualified to manufacture b1 and b3 grade pressure vessels. 2. Each new type of cylinders has to pass type tests held in qualified laboratories approved by third party inspector (tuv, csei for example) before mass production, including bend test, drop test, hydrostatic test, etc. According to relevant standards. 3. Every batch of cylinders (200 pieces as one batch normally) are manufactured and tested under supervision of local special equipment inspection and research institute and then issued batch test report. 4. Each finished cylinder has to pass leakage test before delivery to customers to ensure no leakage occurs. Plastic net, carton and pallet