Estone 1 Set WP-17 18 26 TIG Welding Torch Long Back Cap 57Y02 57Y03 57Y04 This kit fits all 17 & 26 series air cooled torches and 18 series water cooled torches , including the Lincoln PTA-17, PTA-18 and PTA-26 torches, DB18 and DB 26 torches Miller Diamondback DB17, along with the Weldcraft WP-17, WP-18 and WP-26 torches. 1pcs Long Back Cap 57Y02 1pcs Medium Back Cap 57Y03, 1pcs Short Back Cap 57Y04