"ESD safe round dust brush, product SKU, 31653, consists of nylon bristle and polypropylene plastic body. Dimensions: Overall Length: 4.45"" 1.44"" O.D 1.25"" I.D Bristle Length: 1.18"" Bristle Configuration: Round 2.30"" Diameter This product is compatible with our Omega, Express and High Capacity series vacuums. Universal-Compatible Atrix - DESCO/SCS/3M"