Piston rings are manufactured and classified on the basis of function and usability. The primary usage of the piston ring is to seal the chamber (where the piston is moving), which can be a combustion chamber of a 2 stroke or a 4 stroke engine. Marine engines have three or more types of rings fitted on the circumference of the piston. Our inventory reserve is synchronized with original technical improvement. We supply original coated piston rings (especially ALU COAT (TOP RING)) such as DAROS, NPR, PP and so on, suitable for models including MC, MC-C, ME-C, FLEX (RTA48T-B，RT-FLEX50-D，RT-FLEX50-B，FLEX RTA58TB，5RT-FLEX58T-D，RTA48T-B，RTA68T-B etc.), RTA series, etc. In addition to the above coated rings, we also stock a certain number of non-coated rings. Non - coated ring special sale, the specific list is as follows：

No.	Suitable for Model	PART No.	SPECIFICATION	QTY.
（1）	S35MC S35MC-C S35MC-MK7	90201-0201-060 90201-0201-084 90201-0201-072	350*9.5*12.7	199
			350*8*12.7	596
（2）	S35ME-B	2272-0420-0002-017	350*9.5*12.7 (POP)	197
			350*8*12.7	593
（3）	S42MC S42MC-C S42MC7-TII	90201-155-096 90201-155-106 90201-0223-084	420*11*14.7	147
			420*8*14.7	445
（4）	S42ME-B	2272-0420-0002-017	420*11*14.7 (POP)	112
			420*8*14.7	329
（5）	S46MC	90201-0204-084 90201-0204-096 90201-0204-106	460*12*16.2	117
			460*9*16	353
（6）	S46MC-C S46ME-B8	2272-0420-0002 90201-0204-084 POP ：5435765-5.1	460*12*16.2 (POP)	148
			460*9*16	456
（7）	S50MC S50MC-C S50ME-B	90201-0202-072 90201-0202-084 90201-0202-096 90201-0204-106 2272-0420-0002-017	500*12.5*17.2	246
			500*9.5*17.2	738
（8）	S60MC S60MC-C	90201-0220-011	600*14*20	107
			600*11*20	329
（9）	G60ME-C9.2-TII	2272-0420-0002-017	600*14*20 (Cermet Alu-C Cr GT CPR）	157
			600*11*20 （2ND/Alu-Coat Cr Compr ring）	471
（10）	S70MC S70MC-C	90201-181-072 90201-181-084 90201-181-096	700*16*23	107
			700*12*23	326
（11）	RTA48T-B	Q34420 Q34421	480*15*16 SCP1CC	56
			480*15*16 SCP1RC	163
（12）	RT-FLEX50-B RT-FLEX50-D	IF34421 IF34422 IF34423	500x15.0x16.5 SCP2CC	86
			500x15.0x16.5 GTP1CC	72
			500x15.0x16.5 SCP1RC	93
（13）	5RT-FLEX58T-D FLEX RTA58TB	OF34420 OF34421	580x16.0x19 SCP2CC	57
			580x16.0x19 SCP1RC	123
			580x16.0x19 SCP1CC	76
（14）	RTA68T-B	Q34408 Q34410 Q34411 Q34412	680x18.0x21.5 SCP1CC	34
			680x18.0x21.5 SCP1RC	86
			680x18.0x21.5 SCP1RC	63
			680x18.0x21.5 K0P P4	87