For Model: 1. WP17 Series 150Amps Air Cooled TIG Torch 2. WP26 Series 200Amps Air Cooled TIG Torch 3. WP18 Series 350Amps Water Cooled TIG Torch Variant: 1. Stubby Collet 1.6mm (10N23S) 2. Stubby Collet 2.4mm (10N24S)