The most accurate international rules fly gauge on the market.*Made in the UK from corrosion resistant 2mm aluminium sheet.**
- Small and lightweight with machined zinger hole.
- Rules: "Hooks may not measure more than five-eighths of an inch overall, including the eye. The overall length of the fly may not exceed fifteen-sixteenths of an inch."
- 5/8" = 15.9mm1
- 5/16" = 23.8mm
*All measurements within 0.1mm of stated dimensions.
**Gauges may have residual burn marks from the laser cutting process, all gauges are washed in an acid bath and cleaned before packing.