Pemko EXT3/4_ Sill Extender Extenders fit all 5-degree, 4-7/8" wide, and 5-3/4" wide extrusions. Ratings BHMA Certified Finishes EXT3/4A: A - Mill Finish Aluminum Aluminum EXT3/4D: D - Dark Bronze Anodized Aluminum Downloads Pemko EXT3/4 Cut Sheet (.pdf) Pemko EXT3/4 Line Drawing Autocad (.dwg) Pemko EXT3/4 Line Drawing Autocad (.dxf) Close Interested in this product? Contact us to order Related products Pemko EXT2_ Pemko EXT3_