These are the OEM Bilt-Best Casement Window Weather-Strip Parts for your old

BiltBest Casement and Awning Windows. Installed on Horizontal Sill and Head

BiltBest was a respected Missouri‑based window manufacturer known for pioneering wood‑clad innovations and high‑quality products from the 1950s until its closure in 2010, with replacement parts now supplied by successor specialists like BiltbestWindowParts - part of the AllWindowDoorParts Group USA - Casement and Awning Window  weatherstripping parts, sash and window frame weather Strip. NOTES: Standard colors today are Tan / beige. Wood and Clad Casement Frame Type Weather Seals.