This is a Double top only 18 in. deluxe banner arm mounting set, contains cast aluminum mounting brackets with stainless mounting straps. Crossbars are fabricated from 1-1/2 in. outside diameter clear anodized aluminum pole with caps for a finished look. Brackets are ideal for round poles. For square poles we suggest using a U-bolts to attached brackets to pole, see items 310030 to 310032 for your poles size. Banners should be Finished with a Pole Sleeve Top and Bottom. Set Includes:2 - Double Deluxe Bracket2 - Aluminum Poles4 - Stainless Steel Mounting Straps Weight: 8. 15 pounds.