Emperor Clear Emperor heads are made with two free-floating plies of 7-mil Mylar, making them the brightest sounding multi-ply heads and most durable of the classic clear WeatherKing series. Size 18" (NOT BASS DRUM) https://remo.com/portal/products/3/8/49/154/cl_emperor.html [video:https://youtube.com/watch?v=IL9DwOC0_Oo&feature=plcp]