The VIPER bells are intended for big game hunting dogs. So you can easily find your dog whilst hunting thanks to the sound of these bells. They are however smaller in terms of “height” than the ALP bells.
It is possible to adapt the size of the bell to the size of your dog. The VIPER bells are available in 3.5 cm, 4.5 cm, 5.5 cm and 6.5 cm.