Large package systems provide service between two locations where heavy payloads require "ZERO" impact upon delivery. The principal of vacuum pressure (V.P.) down-delivery, using a slide sleeve
terminal accomplishes this requirement with unbelievably quiet results. The carriers are custom designed to meet the system requirements. The maximum inside length is 22". The inside diameter
depnds on the system size. It is usually 6", 8", or 10" o.d. steel tube.