CSN EN ISO 1089 This document specifies the dimensions and tolerances of taper fits between the following: - straight electrodes and electrode holders; - electrode adapters connecting electrode caps and electrode holders; - female electrode caps and electrode adapters; - male electrode caps and electrode adapters. NOTE - Electrode holders and electrode caps utilizing locking tapers are addressed in ISO 20168. Original English text of CSN EN Standard. The price of the Standard included all amendments and correcturs.