<#stamp=stamps> produced in a long strip, either vertically or horizontally. Some were once issued <#imperf=imperforate>. More commonly coil stamps have been issued with <#perf=perforations>, <#diecut=die cuts> or <#roulette=roulettes> between the stamps. Coil stamps have been produced by the <#bep=BEP> and by private printers under contract to the Post Office. Coil stamps were once produced by private manufacturers from <#imperf=imperforate> <#sheet=sheets> provided by the Post Office. Coil stamps are sold by the Postal Service in rolls of 100, 3,000 and 10,000. Historically they have also been sold in rolls of 500.