Great Planes Standard ProGlo Starter Clip with Charger.

This all metal clip attaches to the Glow Plug with a positive lock to keep it secured to the plug so it won't vibrate loose.
Has a convenient charger to charge a typical 1200mAh sub-C cell in about 10 hours (sub C battery is not included).

Built-in meter gives quick, visual indication of glow plug operation without removing plug from engine.

Specifications:

• Shaft length: 1-1/4"
• Charger output: 120mA at 1.25V
• Charger Input Voltage: 110V AC (US Standard)
• Requires One Sub-C cell