1. internal alignment makes appearance beautiful 2. able to be used with the other products from our company,HA400, HA600 etc. G.W.5.1kgWeight Capacity80lbs (36.4kg)Pitch Adjustment-15°/+15°MaterialAl6061-T6 Aviation aluminumFeaturesinternal anti-theft wire lockinternal alignment makes appearance beautifulfit all kinds of size projectorThe largest mounting diameter of the hole:501mm Projector ...