I have Marvin wood double-hung windows installed in 1988 and need a replacement strip for the bottom window. They have an extension that is 1/4" and what appears to be a flattened bulb not filled that is 1/2" flat. The extension fits in a slot at the window bottom.
Also you state your strips come in 25ft increments.....does that mean a Qty of 1 equaLS 25FT?
thank you.
Bruno

