Glass Listral called 157, is a single or monolithic glass, translucent type, ie, that lets unable to see clearly through it neatly. Let more light glasses recorded above, and therefore is somewhat more crisp too. It is printed or engraved glass, giving roughness in the form of stripes to one of its faces. This glass is 4 mm thick and comes in translucent glasses Economic our catalog. It has a weight of 10 kg per square meter. It is advisable to install this type of glass walls facing the outside since it has a high thermal transmittance close to 90 %, ie, is inefficient. This is recommended to prepare glasses camera or Guardian Sun, with this type of glass or other, to multiply up to four efficiency. It is not recommended to shut out the noise, since its thickness of 4 mm just reduce 29 decibels, which incorporated an acoustic glass could reach 45 decibels without problems. This glass stands out for easy cleaning thanks to provisions recorded vertically. In case of preparing a glass chamber with this glass type, will include etching inwardly thereof, so as to have two flat faces on its exterior for ease of cleaning. It is very similar to the model Listral 151, but with some differential details.