Metal Building Roof Curbs - Metal Construction News
DEK-Cap, Universal End-Cap for Flashing Standing-Seam Metal Roof Seam Cap. Fits Up to 4 inch High Seams. Universal Trapezoidal Standing Seam Panel Cap (10 Count) - Amazon.com
Metal Building Curb - Loose Caps - Complete Curbs
29 1/2 in Fan Base, 40 1/2 in Curb, Roof Curb Adapter - 20UV27|20UV27 - Grainger
Roof Curb Cap fits 7" OD - Roof Curb Cover - Model RC-Cap-4