The Welger 0934990400 tensioning block is a genuine OEM replacement part designed for Welger AP series balers, including models AP41, AP42, AP45, AP50, AP51, AP52, AP53, AP61, AP63, AP71, AP73, and AP83. This essential component maintains proper chain tension, contributing to the efficient and reliable operation of your baler. Manufactured to Welger's specifications, it ensures durability and precise fitment. Dimensions are 100mm length, 50mm width, and 50mm height, with a weight of 0.3 kg.