The SIP 10N30 1mm TIG Collet Body is manufactured from high-quality copper for longer life and increased durability, and offers secure holding and positioning of TIG collets and Tungsten welding electrodes across various applications. 10N24 2.4mm collet body manufactured from high-quality copper Holds the TIG Tungsten electrode securely during welding Made for longer life and durability in all applications Ideal for use with quality SIP TIG welders and inverters Convenient and superb value-for-money