Standard features · STC-35 rating · Designed with heavy wall aluminum extrusion · Accommodates 1/4", 1/2" and 1" IG · Thermally improved frame, panels & sill · Welded corner marine boot glazing bead · Heavy-duty tandem ball bearing roller system · Full perimeter weather stripping · Multiple frame depth options · Sloped, anodized sill · Telescoped panel corners & coped frame corners · Colors - White, Bronze & Sandstone · Optional anodize finish · Optional nailing fin