Series 100 resistors offer exceptional performance at an economical cost. Superior stability results from welded construction and windings of premium grade resistance wire on thermally conductive ceramic cores. Hi-temp silicone coating provides excellent protection & solvent resistance. Tin (or SnPb) coated copper/copperweld leads ensure proper solderabilty and extended shelf life. Marked with resis.value & tol. as minimum (custom marking avail).