Billiard table manufacturers have produced convertible billiard tables (in the broad sense) that double as dining tables or as table tennis, foosball, or air hockey, tables, with removable hard tops. Home pool tables, which often lack a ball-return system, are commonly either 4 × 8 ft or 3.5 × 7 ft models, a medium between 3 × 6 ft. bar/pub tables and 4.5 × 9 ft tournament-size models. Low-end tables tend toward the smaller range, and may have MDF or wood beds as an alternative to slate; those with light-weight beds may be foldable for storage, as with table tennis. Miniature tables
Billiard table leather or plastic, may have drop pockets, which are small nets, bags or cups to catch the balls. Ball returns, instead have a series of troughs or gutters inside the table, which channel the balls into a collection chamber on one side of the table. On a coin-operated table, the balls are deposited inside an inaccessible compartment window until the table is paid again, allowing the balls to be released into the collection chamber. A disadvantage to drop pockets is that if too many balls go into the same pocket, it will fill up the receptacle and prevent any more