• Conversion kits are designed to convert your Narroline® window into a convenient tilt-wash window.
• Size 20310 - visible glass dimension is 20 7/16" wide by 19 15/16" high.
• White exterior and a pre-finished white interior saves you time in finishing.
• Improve energy efficiency when you upgrade to Low-E Finelight™™ glass which provides outstanding overall performance where both heating and cooling costs are a concern.
• Finelight grilles are suspended between the panes of glass, allowing you to easily clean both the inside and outside of your windows.
• Kit is an easy-to-install, inexpensive way to add tilt functionality for easy glass cleaning from inside the home.
• Kit includes jamb liners, sash, balancers, new lock and installation instructions.
• Window sash are not routed for recessed older style lock or recessed hand lift.

Do not use conversion kit with combination units dated March 1994 or earlier. Date of manufacture is printed on the outer edge of the combination frame. If "AW" is not molded into the handle of the lower panel, the unit is older than March 1994.