A manifold is a pipe fitting with several lateral outlets for connecting one pipe with others such as a wide and/or bigger pipe, or channel, into which smaller pipes or channels lead. A pipe fitting or similar device that connects multiple inputs or outputs. A plug is an item that 1 provides a fitted closure for an opening designed to ensure a tight seal such as for a sink or a bottle, or for a hole or a space 2 completes an electrical connection. The plug may be removable as for portable equipment, require a tool for assembly and removal, or serve as a permanent electrical joint between two points. Specifications. Width 0.7 in.. Length 0.7 in.