Range: 0.17 to 3.20 mm – 16 sizes, 0.17 to 6.35mm – 21 sizes.
The above wires can be supplied in sets of two or three wires. Odd size wires in inches or millimetres can also be supplied either in sets of two or three wires. The standard set consists of following 16 or 21 sizes in millimetres.
Specification: IS 6311:1978