Maypole MP80 Pressed Steel 50mm Coupling MP80 Pressed Steel 50mm Coupling. Suitable for use as a replacement for Knott KQ7K, AL-KO AK7D, Ifor Williams PO0355, Maypole unbraked trailers MP80 Pressed Steel 50mm Coupling for 50mm Square Tube Drawbars Requires 2 x M12 bolts (min 8.8) Application unbraked trailers, 750kg max The most widely used unbraked coupling on the market Suitable for use as a replacement for: Knott KQ7K AL-KO AK7D Ifor Williams PO0355 Maypole unbraked trailers with 50mm drawbar Pressed steel construction, zinc plated finish 90mm mounting hole centres in top surface R55 approved (D7.2, S75) With wear and correct attachment indicator Supplied without lock. Suitable for use with optional lock MP478B Can be fitted with soft dock MP1940 Fits 50mm Draw Bars For Trailers up to 750kg