Conn2it™ Smooth Wall Flexible ConduitDon't risk pre installing expensive video cables at rough in. Provide a safe path at finish, or at a future date. Large 2" internal opening allows cables to slide right through without removing any connectors. Firm, but flexible for installation in virtually any framing. Smooth sidewall means no cable hang ups. Protects wires and cables from harmful moisture and dirt. Sections attach flush at any desired length. External diameter of 2 1 4" let you use