Simpson SBR/43-R20 Structural Spacer Bracers - G90 Galvanized (box of 20)Model No. SBR 43 R20 Thickness (mil) 43 Ga. 18 L (in.) 50 3 4 Coating Material. Zinc Galvanized, G90 Packaging Qty. 20 The SBR provides bracing along the length of the stud, and for head of wall slip conditions for exterior, structural cold formed steel walls. This structural spacer bracer reduces the installed cost of cold formed steel stud walls by enabling faster stud layout with pre punched slots that minimize the need for bridging clips with on