"FILLER IS STRAIGHT, RESILIENT, NEW, NATURAL HOG BRISTLE; BRISTLE IS WASHED AND STERILIZED USING EITHER DRY HEAT OR AUTOCLAVING; HANDLE IS CLOSE GRAINED, STRAIGHT GRAINED WOOD, OR GENERAL PURPOSE IMPACT RESISTANT PLASTIC; BRUSH HAS A ROUND CROSS-SECTION; BRISTLE IS SET IN VULCANIZED HARD RUBBER OR SETTING COMPOUND; HANDLE, FERRULE, AND SETTING COMPOUND WITH IMBEDDED BRISTLES IS SECURELY FASTENED TOGETHER"