Guide rail part for a conveyor adapted to convey product carriers in a hanging manner, where the guide rail part is adapted to be positioned centrally in a main rail of the conveyor, where the guide rail part comprises a body, wherein the guide rail part comprises an actuator pivotably suspended to the body, where the actuator is movable from a first upper position to a second lower position, and a stop member pivotably connected to the actuator such that the stop member is in a raised stop position when the actuator is in the second lower position and that the stop member is in a lowered bypass position when the actuator is in the first upper position. The advantage of the guide rail part is that a queue with product carriers can be realized, where the spacing between the product carriers is obtained with the guide rail parts in an easy and cost-effective way.