Weatherstip for bottom rail of 2005 Vetter 820 casement window

Hello, Seth, thanks for contacting us. What you're showing here looks like an older style of bubble seal. It's tough to say exactly what type it is, though, since it's so compressed. I'd hazard to guess that our 58-053 is what you're looking for, but you should look it over to confirm. 

Profile drawing of the 58-053 bubble seal.