This 6-pack provides 24-inch long vertical closure strips made from plastic. They are designed as replacement components for sealing the vertical side laps or end closures on corrugated metal roof installations. The plastic strips are formed to match common corrugated profiles. During installation, they are compressed into the panel ribs to block the passage of rain, snow, wind-driven debris, and insects. Their design accommodates the natural expansion and contraction of the metal roofing material. For proper selection and installation, it is important to check compatibility. Confirm the required length for your vertical seams. Most importantly, verify that the profile (shape) of the plastic strip aligns with the specific corrugation pattern (e.g., R-panel, U-panel) of your existing metal roofing. These strips are intended for use in sealing applications on residential and light commercial metal roofs.