Disposible pinwheels - 20 count.Neuro 7 disposable pinwheels were designed so that a practitioner can easily utilize the Neuro 7 pinwheel and still adhere to BBP standards. The Neuro 7 pinwheel is replaced by sliding off the battery door and removing the wheel and exchanging it for a new one. The disposable pinwheels are available in packages of 20.