Mammut Nordwand Alpine Belay Black one size. An innovative and robust belay device. With V-shaped grooves and rear rope-bearing surfaces made of abrasion-resistant steel to prevent wear. The steel insert also prevents the belay device from overheating. The housing is made from lightweight aluminum so that the total weight of the device amounts to just 80 grams. Suitable for double half and single ropes ranging from 7.5 to 10.5 mm. Specifications for Mammut Nordwand Alpine Belay: Manufacturer: Mammut Color: Black Fabric/Material: 100percent Aluminium Weight: 80 g Package Contents: Mammut Nordwand Alpine Belay Mammut 2040-01602-0001-1: Nordwand Alpine Belay Black one size