Our Ring Carriers are mainly for diesel engions and some for petrol ones.This kind of ring carriers are suitable for pistons of both trucks and cars. The advantage of this Ni-resist Ring :with high precission and durability,it can lenghthen the span of both pistons and engines; it can also decrease usage amount of diesel or petrol; it can be applicated to both cars and trucks;it is the combination of Chinese and Japanese technology. We have been awarded with both national patent and international recognization on this kind of product and subsequently got the certification ISO/TS15949 and ISO/TS16949 in the year of 2006 and 2009 respectively. we have shaped product standard of our own.On the other hand,we have been supplying goods with credible quality in OEM market. So you can contact us with your drawings and other special technical requirements if you are in need of our products and service.