Stock ring We have many stock ring , such as Cummins , Caterpillar , Hino ,Nissan , Komatsu , Mitsubishi ect . Stock: NT855 Size: 139.7mm. Part number : 3801056 Characteristics for Oil ring: Steel material, small holes... Delivery: Stock ring. It can be shipped within 3 days. Remark: 1)For European& American, Korean & Japanese etc. Engines 2)Good quality 3)Competitive price 4)Secure service 5)We can develop new items for you especially. Desire our cooperation!