This E approved high reach 50mm towball provides clearance for caravan couplings with integral stabilisers such as AL-KO Winterhoff. It has a D Value of 17.2Kn and an S Value of 350kg, with Approval No: E11 55R-019665. It features 2 x M16 mounting bolt fixing holes and is approved to UN/ECE Regulation 55, which replaces EC94/20 towbar regulation with additional test and administration requirements. Fitting requires BS3692 grade 8.8 H.T. bolts with lock washers, torqued to 240 Nm, with torque to be checked after first use and regularly thereafter. This Maypole tow ball is suitable for Alko and Winterhoff hitches and has a nose weight of 350kg.