Universal Stud Bushing 500 - Arlington Non-Metallic, 2x4 Studs, 500 Qtynon metallic bushing snaps into standard knockout and fixes into common hole configurations for 2 x 4 metal studs, sold in a quantity of 500. Package size: 500 Basic Information Part Number SB13 Description Non metallic bushing snaps into standard knockout and fixes into common hole configurations for 2 x 4 metal studs, sold in a quantity of 500. UPC A 018997401151 Unit Packaging 500pcs Standard Packaging 500pcs Country of Origin Listing Physical