DRIVE BELT POWERLINK 835 / 20 -30 t size is 835x20x30. 20mm wide(about 3/4") and 835 mm long(about 33") belt fits the following models: Vento BKM Xeidon 150 Vento Phantera 150 Vento Phantom GT5 150 Vento Phantom R4i 150 w/Turbo Vento BKM Xenon 50