Premier Flex Lite Liner has the same quality and technology as our standard Premier Flex Liner except it is much lighter. It is constructed of .010″ thick steel as opposed to the standard heavy wall .015″ thick steel. The thinner steel has the durability of the heavy wall liner but at a more manageable weight. Offered in 304 and 316 L/Ti. See our M-Flex Smoothwall Chimney Liner, if you need a liner that reduces sizing by 20%.