All of Issler's records were recorded on fragile hollow cylinders made of a waxy blend of materials that usually became brown-colored during the making of the blank cylinders, so they are called "brown wax cylinders" because of their shape and usual color. Their actual color can be anywhere from nearly white to a very dark brown. They are about 4¼ inches long and 2¼ inches in diameter. Not many cylinder records made in the 1890s have survived and the survivors are almost never in like-new condition, so the sound recorded on them is now less clear than what people heard when they were new and there is much more noise mixed in with it.