The term 'BILLIARD TABLE PART' refers to three components of a billiard table: the RAIL, the SLATE, and the CUSHION. The RAIL is the wooden frame that surrounds the playing surface of the table. The SLATE is the flat, smooth surface of the table, usually made of stone or SLATE. The CUSHION is the rubber lining around the edge of the table, which provides a rebound effect when the balls hit it. Together, these three parts make up a billiard table.