The series 2900 vinyl single hung window has a fusion welded vinyl frame and sash which creates strong, weathertight corners. Dual weatherstripping virtually eliminates drafts. Block and tackle balance system offers smooth, reliable operation. Integral J-channel allows for neat, easy trimming of exterior siding to the window. A colonial brickmold design offers a traditional look. Low E3 glass is insulated with argon gas to reduce heat loss. Color matched cam action lock. 1/2 screen with charcoal fiberglass screening included. 6/6 pattern grilles are sealed within the glass for easy cleaning. U-factor is 0.30. Limited lifetime warranty. White. 36" tall x 24" W., rough opening 36-1/2" tall x 24-1/2" W.