Suction channel end part for discharging fiber fly in the region of a drafting system by applying negative pressure, the suction channel end part comprising a first component to which negative pressure can be applied and which has an inlet and an outlet that communicates with the inlet, the first component having a tubular shape with a longer extension along its axial tube axis than along its radial extension, and the inlet being designed as an elongate hole extending parallel to the axial tube axis, the suction channel end part having a second component to which negative pressure can be applied, which is designed as a cover element and which can be exchangeably connected to the first component, the second component having an opening which, in the assembled state of the suction channel end part, forms a suction mouth which communicates with the inlet and via which the fiber fly can be discharged into the suction channel end part when a negative pressure is applied, characterized in that the inlet is surrounded on its longitudinal sides by spring-like guide elements which can be brought into engagement with complementary groove-like guide elements of the plate-shaped second component for assembling the first component and second component, the groove-like guide elements being arranged on the longitudinal sides of the second component, and the spring-like guide elements each having a latching receptacle which is provided in each case for latching with a second latching pawl, with the second component, arranged at a corresponding position, the latching receptacles and the associated latching pawls holding the first component and second component stationary relative to one another in the assembled state. a first component to which negative pressure can be applied and which has an inlet and an outlet that communicates with the inlet, the first component having a tubular shape with a longer extension along its axial tube axis than along its radial extension, and the inlet being designed as an elongate hole extending parallel to the axial tube axis, the suction channel end part having a second component to which negative pressure can be applied, which is designed as a cover element and which can be exchangeably connected to the first component, the second component having an opening which, in the assembled state of the suction channel end part, forms a suction mouth which communicates with the inlet and via which the fiber fly can be discharged into the suction channel end part when a negative pressure is applied, characterized in that the inlet is surrounded on its longitudinal sides by spring-like guide elements which can be brought into engagement with complementary groove-like guide elements of the plate-shaped second component for assembling the first component and second component, the groove-like guide elements being arranged on the longitudinal sides of the second component, and the spring-like guide elements each having a latching receptacle which is provided in each case for latching with a second latching pawl, with the second component, arranged at a corresponding position, the latching receptacles and the associated latching pawls holding the first component and second component stationary relative to one another in the assembled state.