Slimline 90º Corner Bead Trim-Tex | Wallboard Tool Company
Trim-Tex 375 Fast Edge Roll-100' X 3.75" — Timothy's Toolbox
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4-Pack Trim Tex Corner Bead Bullnose 90 and 135-Degree Mitre/Miter Gauge - Mark Inside Cornerbead Cuts for Window Sills and Door Frames : Amazon.sg: DIY & Tools