Manufacturing, Procurements & install CNG converter kit (include CNG ylinder) on used cars. The sizes that we need to be supplied as follow: Item Capacity (lit) O.D.(mm) X Length (mm) 1 20 232 X 600 2 28 232X800 3 57 356X800 4 77 356X1020 5 101 406X1000 6 112 406X1150 7 130 406X1300 With follow specification: Material: 34 Cr Mo4 ( Type 1). Refrence Standard: ISO 11439. Working Prssure: 200 untill 250 Bar. Blasting Test Pressure: Over than 45 Mpa. Test Pressure: 300 Bar. Note: Please attention item 1&@ is top urgent and we are ready to open LC quickly. The requests will be increase after aprove your ability. technical documents and test reports as follow: Type approval. The certificated that show you are able to produce cylinders under consideration ofISO 11439. Test certificate include follow reports: Ambient cycle test. Acid environmental test. Extreme temperature test. Hydrostatic Burst test. Drop test. Bonfire test. ASR test. Penetration test. Natural gas cycling test. Corrosion t After purchasing the aforementioned quantity we will buy certainly for 2.5 times o the quantity as we are facing a big demand in Iran. Please ensure that your price is competitive as we are sending such a query with the other manufactures for the price. (don't forget the speed if you want win the bid or the discount sale)