LaB6 CathodesModel 102248 and 102170 Single Crystal LaB6 cathodesFeatures Single Crystal LaB6 ( Lanthanum Hexaboride ) emitter Directly heated construction Can include 102170 flange mount with shield⁄focus electrode Model 102248-01 Ø2.0mm Model 102248-01 Ø2.8mm Model 102170 Includes 102248 Cathodes