Description_x000D_ General description_x000D_ With joints for easy removal of condensate. Serrated hose connections for side tube have an O.D. of 13 mm at the smallest serration and 16 mm at the largest serration. Center tube hose connection is always 10mm for easy connection to manifold bank tubes which are also with 10 mm hose connection._x000D_ Legal Information_x000D_ Synthware is a trademark of Kemtech America Inc.