In 1976, coins were introduced in denominations of 1, 5, 10, 25 and 50 thebe. The 1 thebe was struck in aluminum, with the 5 thebe in bronze and the others in cupro-nickel. These coins were round except for the scalloped 1 pula. Bronze, dodecagonal 2 thebe coins were introduced in 1981 and discontinued after 1985. In 1991, bronze-plated steel replaced bronze in the 5 thebe, nickel-plated steel replaced cupro-nickel in the 10, 25 and 50 thebe and the 1 pula changed to a smaller, nickel-brass, equilateral-curve seven-sided coin. A similarly shaped, nickel-brass 2 pula was introduced in 1994. In 2004, the composition was changed to brass-plated steel and the size was slightly reduced.