Shakespeare Style 410-R Mounting KitCombines the Style 91 Swivel Mount with the Shakespeare Style 408-R Insulated Stand-off Bracket. The molded upper bracket features an insert to accept 1" or 1-1/2; diameter antennas or extension masts. Includes an 1-1/8" insert. The swivel mount is stainless steel construction. - cis2:mm5mnJlm -Specifications: Type: Mounting Brackets; Box Dimensions: 4"H x 6"W x 6"L WT: 2 lbs; UPC: 719441110819; Quick Guide (pdf)