CT-446 & CT-446-18 Spark Plug Tray   Sturdy steel tray holds up to 12 or 18 aviation spark plugs. Speeds handling of used or new plugs. Holes numbered to correspond with engine cylinders. Protects against shielding barrel con-tamination. Flat rubber, non-slip pads. Approximately 5 in. X 8 in. X 3 1/2 in./ 12.7 X 20.3 X 8.9cm wide. Weight 1 lb./0.453kg.