Model HW 303 Single Hung Window Maintenance-free all aluminum construction, made with extruded 6063-T5 aluminum profile Available in impact resistant glass, single glass and insulated glass. Surface treatment available in anodized, powder coating and wet painting Lite configurations available in full-view and colonial style Available in a variety of glass styles: Standard clear, obscure, energy-efficient bronze, gray, Low-E glass; Annealed glass or tempered safety glass; Or impact-resistant laminated glass. Available in a variety of finish colors, including bronze, brick red, beige, dark green, silver, bone white, sage brown or any other custom finish colors. Available in flange type or fin type Available in thermal break system Vent removable from inside for easy cleaning Concealed Block & Tackle Balances made in the US