Profile: J.D.Products manufactures and exports centrifugal casted cylinder liners and sleeves for all types of tractor, truck & car engines. We are an ISO 9001:2000 certified company. Our products are cylinder liners(wet liners) and cylinder sleeves(dry liners). Our cylinder liner which is of an internal combustion engine includes a wet-type upper portion, and a dry-type lower portion. Our cylinder sleeve or dry cylinder liner has a flange at the outer circumference of the upper part of a liner barrel, and also has a grind relief groove formed below the flange at the outer circumferential surface of the liner barrel. The upper surface and the lower surface of the flange are coated with a coating film comprising a heat resistant resin containing a solid lubricant.