The Antari M-9-HB is a hanging bracket set for the Antari M-9 special-effects unit. The manufacturer specifies that two M-9-HB bracket sets are required for one M-9. The available product information does not state the bracket dimensions, weight, materials, load capacity, fixing hardware, environmental rating, or installation procedure. The M-9-HB is a passive mounting accessory and does not generate or control special effects.