This WonderTube consists of 2 layers of Exp. #140 Jupiter V1with 1 layer of Simax clear on top. With Jupiter being a striking gold and silver color with an opalescent hue, this color yields rich transparent oranges and pinks. The Simax clear coat allows for a more controlled strike, although it is unaffected by the kiln. Therefore, the strike varies depending on the thickness of the glass and flame chemistry. Easy to use and flame stable. Limited yield.