The tension gas springs in AISI 316L are based on the opposite functional principle to the compression ones, they are mostly used in places where there is no space for traditional compression springs; this type of gas spring is applied for opening such as hatches, windows, shelves, opening downwards. The choice of AISI 316 L stainless steel is given to satisfy those sectors such as the food and pharmaceutical industries and naval, in which the work environment is characterized by the use of particularly aggressive substances and liquids (such as salty water).