Uniflow Model: Challenger UF 18E5BRef No: 722E1 09/07/2018 Mark Blown Film Lines, Latest Machines Description: Dual flow air ring for a 400mm die head Contact us for more information by calling +44 (0) 1226 732137, +44 (0) 7976 258968 or email sales@lynxmachinery.co.uk.