Standard Painted Metal Base Vent-Pure White Screen Frame w/White Lid Features Self-centering device eliminates installation guess work and assures perfect alignment in roof opening. Attractive radius corners are standard. Screen allows air through while keeping insects out. Positive-seal weather stripping is leak resistant and water tight. One-piece seamless frame with a deep drawn painted metal base. Advantages Acrylic UV Resistant translucent lid conforms to Federal Motor Vehicle Safety Standard (FMVSS) No. 205 glazing materials. Injection molded telescoping garnish accommodates a variety of roof thicknesses. Hand crank to open and close lid securely or available with power lift lid with remote switch available. Self centering metal base with radius corners.