50mm Ball Coupling Head = Fitted with cast locking head. Towing Capacity = 1100 – 2000kg. Front Hole Centres = 110/120mm. Handbrake with Oil-Damped Energy Store = for progressive lever movement. Coupling Head KNOTT 2000kg Ø 45mm 2 x M12 Cross Holes. Coupling Eye KNOTT 40mm 2000kg Ø 45mm M12/M12. Damper KNOTT 1100 – 2000kg (87 0011 09)? Drawtube KNOTT up to 2000kg. Energy Store Knott to 2700kg fit KF27 Black Plastic. Clamp Handle Knott Long. Coupling Head Knott 2700kg Ø 45/50mm M12/M12.