Infusion tethers use a range of spring types to suit the species and number of channels. “H” signifies a heavier gauge spring which may be specified on custom tethers for extra protection if the animals can bite the tether (however, using a counter-balanced mount is the best way to avoid problems from biting).
Replacement springs are available in standard packs of five 12in (30cm) lengths, non-sterile. Custom lengths are available on request.