Profile: J.D.PRODUCTS manufactures and exports centrifugal casted cylinder liners and sleeves for all type of tractor, truck and car engine. 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 liners has a flange at the outer circumference of the upper part of a liners 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. We are an ISO 9001:2000 certified company.