The Tandem Speed from Petzl is a double rope pulley and, according to Petzl, the fastest available transport pulley for auxiliary ropeways made of textile and wire rope. It is made of stainless steel, has wear-resistant rollers and has been specially developed for ropeways with low inclines. The encapsulated ball bearings enable high speeds and a consistently high level of efficiency, regardless of temperature, humidity or the weight suspended from it.