These standard collet bodies are for use with type WP17, WP18 and WP26 tig torches.
Screw in collet body spares are available in the following sizes.
0.5mm (.020") 10N29
1.0mm (.040") 10N30
1.6mm (1/16") 10N31
2.4mm (3/32") 10N32
3.2mm (1/8") 10N28
4.0mm (5/64") 406488