Blue Sea Systems AC Isolation Cover - 5-1/4 x 7-1/2x3 - 4027Blue Sea Systems AC Isolation Cover 5 1 4 x 7 1 2x3 4027 Provides electrical insulation for exposed panel backs Provides mechanical protection for panel backs protruding into lockers Lightweight material is easily drilled for wire entrance and exit Meets ABYC requirements for panels with combined AC and DC Covers a panel, or other object, 7 1 2" long x 5 1 4" wide, x 3" deep.