Long Reach Expanders for Fin Fan Cooler (Click for more Info) Tools for expanding tubes in condensers, chillers, heat exchangers, fin fan coolers, feedwater heaters and surface condensers. As standard expanders are supplied with STC collar. Available in regular and long reaches (some diameters, up to 5m) and as the 5-rolls version for rolling thin walls. Many different shaped rolls are available. 1200 SERIES TUBE EXPANDERS FOR FIN FAN COOLERS 1200-5 SERIES TUBE EXPANDERS FOR FIN FAN COOLERS