In roulette gambling, there are several different types of inside bets. A Six Line is also known as a Double Street and is a bet on two streets which adjoin. A trio is an inside bet between 0, 1 and 2 or 0, 2 and 3 in the single zero layout. A basket is a bet on 0, 1 and 2 or 0, 00, and 2, or on 00, 2 and 3 in the double zero layout. A top line is a specific five number bet on 0, 00, 1, 2 and 3 in the double zero layout.