These GE 6386 Triple Mica Black Plate 6386 are ruggedized computer rated version of the 2c51 396a tube with a D getter. Absolutely the best of the best for the Gates STA-LEVEL Compressor, FAIRCHILD 660 and 670 compressor, and Manley Variable Mu Stereo Limiter/ Compressor. New, Unused, from 1950’s and 1960’s. NOS In original RCA and GE boxes, all were made by GE. We currently have seven pieces available of the triple mica version with bent D getter. Please see our other listing for the two mica version. Price is $399.99 per tube.