HTC tube fittings are convenient [building block] components. The offer great flexibility in the design and construction of high and ultra-high vacuum system. -- Flanges : 304 S.S. ( Other material available upon request ) -- Fittings : 304 S.S. ( Other material available upon request ) -- Flexible hoses : 304 S.S. -- Flexible bellows connections : 316Ti, 321 S.S., 316K S.S., 613 S.S., 304 S.S. -- HTC tube fitting are made from welded pipe or tube. -- Larger or special size available upon request -- Seamless pipe or tube are available upon request.