The 20D510AL.2 is a ValuMax^® UV Enhanced Aluminum Broadband Mirror with a diameter of 50.8 mm, thickness of 12.0 mm, and flatness of λ/5. By taking advantage of advanced polishing techniques and our high volume manufacturing, ValuMax^® mirrors are truly cost effective. This family of mirrors boasts seven standard metallic and dielectric broadband coatings, covering the UV, visible, and IR; and are available in 12.7, 19.05, 25.4, and 50.8 mm (0.5, 0.75, 1.0, and 2.0 in.) diameters and square sizes utilizing Borofloat® 33 substrates. This mirror has a 60-40 surface quality and is coated for 250-600 nm.