Os Engines Fs 70 Surpass Rc 4C 70 High Performance RC Engine Bearings OS ENGINES FS 70 SURPASS RC 4C 70 High Performance RC Engine Bearings QTY. 1: MR16002 TH9/C3C (15x32x32 MM)  QTY. 1: R6-2RU TH9/C3 (0.3750x0.8750x0.8750 IN)