For the widest range of carpet grooming 600 teeth of polypropylene, with 15", combing surface 35 sq. inches. Carpet combs are an essential part of professional carpet cleaning. By combing prior to cleaning, dirt is loosened and matted areas are lifted allowing the shampoo or dry cleaner to do a more efficient job. By combing after cleaning, the nap is restored and the pile can be realigned giving the job a truly professional look. Because there are many different carpet types. Braun has designed different combs: R12,R14 & R17, with the R11 and R16 smaller versions. All of Braun's carpet combs have a built in plastic bumper to protect walls and furniture. Takes a standard threaded handle.