14" RADIAL ULTRA-LITE BRUSH is a perfect complement for ROCKER - one to clean normal jobs, and the other for all the difficult jobs. Weighing just 6oz (170 grams) without the swivel, 14.0" on the glass, and just 1.3" deep, ULTRA-LITE is an incredibly light brush. The bristles are 'radial' so you can clean corners, and break the surface tension of the glass, supported by a small White Non-Scratch pad in the center for extra agitation. The jet-streams are also 'radial' so you get a perfect rinse all across the top of the ULTRA-LITE meaning you will always use ON-GLASS-RINSE. The (standard) flowrate for this brush is 03GPM (1.5LPM). Fitted with PIVOT swivel. Truly, a remarkable advance in Radial Technology.