A connector assembly which is adapted to selectively attach a cooperating member to a rail of a merchandising shelf includes a U-shaped lip including a first end and an opposite second end such that the first end is adapted to be selectively attached to the cooperating member and the second end is adapted to be selectively attached to the rail. The clip includes a first arm, a second arm and a bridge portion joining the two arms. The clip includes a resilient material and wherein the first arm is spaced from the second arm such that the first arm is movable in relation to the second arm. A protrusion extends in a direction generally perpendicular to a plane of the first arm. The protrusion includes a section configured to selectively cooperate with an engagement portion of the rail. The first engagement portion of the rail includes a layer of a flexible thermoplastic material having a Shore A hardness of less than 75.