DEAR SIR We want to buy seamless steel cylinders for high pressure oxygen gas cylinders confirming to IS 7285 specification. Water Capacity 40 / 47Ltrs Gas Industrial Oxygen Specification IS 7285 Filling Pressure 150kgf / cm. Sq Test Pressure 250Kgf / cm. Sq Outside diameter 232 / 219MM ( approx) Length approx 1370 / 1330mm Base Concave Internal thread 25. 4mm as per IS 3224 Neck ring Required Painting Black Valve With Quantity 300 Cylinders We are in business of industrial cylinders we can purchase huge quantity Of the same long term basis. Please offer CIF  Nava Shiva (India)