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The Alias from Axiom Discs is intended as a straight midrange. Is has a rim depth of 12mm (outside edge to inside edge), a 21.5cm diameter and is available in 174-178g.
Of the currently two midranges that Axiom produces this is the more stable of them, with the Theory being the understable partner.
Proton is a durable and translucent plastic. Like all Axiom Discs these are actually manufactured by MVP Disc Sports (sister brand). One of the key differences is that Axiom has coloured flight plates and coloured rims (note: Axiom discs may have a white rim, if they do they are not glow discs, unlike MVPs Eclipse Proton).
The Alias is also available in Neutron.