This Kramp AK506839 V-belt is a high-quality aftermarket replacement, directly equivalent to the AL-KO OEM part number 506839. Designed for AL-KO lawnmowers, including models such as the 520 BR, 520 BRV, 520 BRE, 520 SP, 520 SP-A, 520 SP-H, 520 VS, 520 VSB, 520 VSI, 520 VSP, 520 VSR, and 520 VSI-B. With an internal length (Li) of 745 mm, an external length (La) of 785 mm, and a top width of 10 mm, this durable rubber V-belt ensures reliable power transmission for optimal mower performance.