The ALUTRUSS AL-21 is a 21 cm boom arm for the ALUTRUSS conus system. It features a 50 mm truss pipe with a 2 mm wall thickness and is manufactured in Europe. The arm has an aluminium-coloured finish, weighs 0.66 kg, and supports a maximum carrying capacity of 30 kg. Its compact design is intended for use as a trussing accessory.