ProTek R/C 7x19x6mm "Speed" Ceramic Front Engine Bearing (O.S., Novarossi, RB)
[PTK-607E-2RS-C]

ProTek R/C 7x19x6mm "Speed" Ceramic Front Engine Bearing (O.S., Novarossi, RB)
Richard Hess - Rating: 5 of 5 Stars! Verified Owner Sunday, January 17, 2010
owned plenty of both, they might be packaged by tko but they are different ...internal ball guide is not the same... my protek's have never leaked