Characteristics Grafi top units size 9 (height 490-715-940 mm) can be post mounted using the fixing frame made up of 4 brackets, 2 profiles and 2 collars. Minimum post diameter for application: 100 mm. Fixing to post using adjustable metal clamps or band-it tape with size up to 3/4". Materials Steel profiles and brackets with 18-24 micron black cataphoresis treatment. AISI 304 stainless steel fasteners. Post adapter collars made from die cast aluminium alloy UNI EN 1706 AC46100DF