Brass compression tube fittings are just our line, mainly concerning brass compression connector, brass comression coupling, brass male adapter and brass male connector, regular threads for BSP and NPT available, hot forging and CNC machining brass rod material, available size rang from 4mm to 108mm for welding tube diameter, which is applicable for gas, water, plumbing as well air conditioner system etc. Regular surface treament include brass color, nickel plated and chrome plated, 100% leaking test before making shipment. Additionally, it is welcome for any OEM drawing requests for us.