Fluke FUSE-1A-600VBLSTR FUSE, FIBER, 1A 600V, FAST, LOT QTY 5 - CAUTION! SAFETY ISSUE FOR F-8X SERIES. DO NOT USE ABOVE SN 66290001 FOR F-83. NOT ABOVE SN 66340001 FOR F-85, OR ABOVE SN 65650001 FOR F-87