Pella 250 Series 23-1/2-in x 37-1/2-in White Exterior White Interior Vinyl Replacement Double Hung Window Low-E argon Double Pane Glass (Full Screen Included)

250 Series 23-1/2-in x 37-1/2-in White Exterior White Interior Vinyl Replacement Double Hung Window Low-E argon Double Pane Glass (Full Screen Included). Pella® 250 Series vinyl double-hung windows are a secure double-hung window and feature a unique tamper prevention system and multichambered frames for more peace of mind. Dual-pane NaturalSun Low-E insulating glass with Argon delivers excellent insulation from the heat in the summer, while allowing the sun's heat to flow in and warm your home in the winter. Top and bottom sash open for ventilation and tilt in for easy cleaning. Pella’s vinyl uses a fade-resistant formula that is performance-tested for excellent weathering, durability and color retention. A cam-action lock is made of metal and provides long-lasting performance. Pella's exclusive weather-repel system provides three points of protection — including a sloped sill and sill interlock, a design that channels water away from the window and triple weatherstripping. A unique tamper prevention system with interlocking checkrail, steel hardware reinforcement and a unique anti-jar sill helps protect from intruders. Block Frame installation for easy installation in old aluminum or steel frames or pocket replacement in wood frames. Backed by Pella’s limited lifetime warranty, one of the strongest warranties in the industry