Allpro swing arm chain sliders for Derbi Senda/ Aprilia RX/SX 50cc mopeds without swing arm/ shocker linkage. These plastic sliders protect the swinging arm from the drive chain. A good condition slide improves the efficiency of the transmission. Chain lube will increase the life of the chain, sprockets and sliders. Available in red or black. equivalent to Piaggio 00H01803331
