The S-5-Q clamp (“Q” represents the shape of the clamp) is designed for large, round “bulb” seam configurations, such as Zip-Rib®, BEMO, Kalzip®) and similar profiles. The Q will also fit smaller, “bulb-shaped” profiles (dia ≤ 0.75”; 19 mm) if the seam is not properly closed.
Also, check out the more cost-effective S-5-Z for these applications when seams are properly closed.