The Woodgrain Millwork 1-1/16 x 1-5/8 x 96". Primed Finger-Jointed Pine WM 188 Drip Cap is used over exterior doors and windows. Primed Finger-Jointed Pine WM 188 Drip Cap also helps keep water from getting behind doors and windows. When used over windows, drip cap helps direct water away from the window glass.