Remo Coated Ambassador heads are medium-weight heads made with a coated single-ply 10-mil Mylar film to produce a warm open, bright, and resonant sound with a warm attack. Coated Ambassador heads are the standard of the industry for both live and recording situations. Pre-International sized drum skins were used prior to 1968 when Imperial sizes became Metric. They were used by Premier drums & Premier's Olympic drum range.