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The one-piece flanged bolster cup from Astralloy is designed to replace vertical and horizontal bowl wear liners. It is recommended for application on new car trucks and rebuilds when the bowl is completely reconditioned to OEM specs. No welding or lubrication required. It comes in 14-inch and 16-inch sizes in Rol-Man, fully austenitic 11 percent to 14 percent manganese steel and stainless steel.