Sealey-VS270-Multi-Voltage-Glow-Plug-Tester-Sealey-VS270-Designed-to-test-low-voltage-glow-plug-operation-on-modern-diesel-engines-Prevents-glow-plug-damage-caused-by-testing-with-the-vehicle-battery-Glow-plugs-can-be-tested-whilst-in-situ-Supplied-in-storage-case-with-instructions-Requires-9V-battery-not-included-Sealey-VS270-Multi-Voltage-Glow-Plug-Tester