TN 53221HD 42" 24 SR High Density Proex/Wire Main Broom for Tennant Sweepers. An exclusive broom designed for heavy duty indoor and outdoor sweeping jobs. A high density version of our most popular broom, the proex and wire blend. This broom featrues a 24 single row configuration for heavy debris and long life. Proex is a blend of three different diameter x-shaped polypropylene filaments. This Proex blend is mixed with some crinkle wire which is used for attacking compacted dirt and debris. This broom can be used indoor or outdoors on wet or dry surfaces. A great overall sweeping broom. Fits Tennant 240, 250, 255, 260, 265, 275, 275SE and 280 sweepers. Will not fit Tennant model 240EH (See 22643, 8 Double Row Proex/Wire), or Tennant model 255-II / 275-II (See 11861, 8 Double Row Proex/Wire). Not offered by Tennant. Our Part Number TN 53221HD