the windows weigh 14 lbs and are 35" wide by 21 1/4" tall. the channel the spring and slide runs in is 1 7/16" wide by 1/2" deep. I am not able to remove the slide without having to cut the channel and i am unable to find any numbers on them. I am also looking for the weather strip for the bottom of the window as pictured, not sur if you carry that king of replacement