STX4 EVOM™ Electrode with Removable Blades for TEER in 6.5 mm InsertsFeatures Electrode blades are replaceable. Over a period of use (after months or years) when the electrodes may have formed deposits from media or samples and may start showing reading instability, you may change the blades without having to replace the entire electrode. NOTE: Regular or daily cleaning after use will extend the functional life of the electrode blades. The electrode tip is specially coated and does not need to be chlorided with bleach