The Caul is named in honor of the late John McCauley. John was regarded as one of the best referees in National Hockey League history.
- The Fox 40 Caul CMG has a traditional harmonized trill tone and clear loud sound; the Cushioned Mouth Grip (CMG) provides soft contact area and reduces impact on teeth
- Compact pealess design for flawless performance
- Elastomer material is warmer in cold arenas
- Indestructible polycarbonate body
- Design: 2-chamber pealess + CMG / Sound Power: 110 dB