CRL Satin Anodized No-Draft 3" x 11-1/2" Mail Slot,C.R. LAURENCE,NDMS13A,NDMS13A" /> Available in Satin Anodized and Black Anodized Energy Efficient, Ideal for All Climates Internal Brush Strip for Added Insulation and Privacy New Design for All Thicknesses of Glass, and Even Insulating Glass Doors