Shakespeare Style 408-RUPPER BRACKET WHITE MOLDED PLASTICInsulated stand-off bracket of white molded plastic. Corrosion resistant. Easy-open for quick laydown. For use with Styles 81-S and 407 Swivel Mounts and antennas of 1" (using insert provided) or1-1/2" diameter. Now includes a new 1-1/8" insert! Specifications: Type: Mounting Brackets Box Dimensions: 2"H x 6"W x 6"L WT: 0.6 lbs UPC: 719441110796 Quick Guide (pdf)