#50320Racing Break Pulley 20TFor 1/8 On-Road Racing CarDesign for use in 1/8th On-Road Racing chassis, fits with Kyosho Evolva 05/M3,Mugen MRX-4X, weight light with original plastic pulley, but provide 3 times up durability , and with side dusty hole, you don't need to clean your pulley after running.SPECIFICATION:S3M 20T Belt PulleyWeight:10gAluminum 7075-T6 Hard Coating.