It's where we live!
The screw adjuster makes easy attachment in, and removal from, the suckers nose. Small (70mm) is for calves through to 8 months. Medium (80mm) for 8-24 months. Large (85mm) for cows and bulls. (The dimension is the depth top to bottom.) All these weaners are the same width.
Available in:
Small SKU 261101
Medium SKU 261119
Large SKU 261062