Roswell 3" Universal ClampThe Roswell 3" Universal Clamp is designed to work with Roswell products to help your speakers and board racks fit towers up to 3" in diameter. This universal clamp comes with 2.375" & 3" inserts with other sizes available for purchase.Product Features: 316 Stainless Mounting Hardware; Brushed Clear Anodized Finish; Includes 2.375" & 3" Plastic Inserts;