Spark Plug Tray De-coder
a. Number of cylinders: 4-Cylinder, 6-Cylinder
b. Engine configuration: Lycoming, Continental, Franklin
c. Spark plug configuration: Multiple, Single (specifically design for one type but could fit others)
d. Aviation spark plug type: Short-body or Long-body

Example: 4 Lyc Multi Short
a. 4 Cylinder
b. Lycoming engine
c. Multiple spark plug design
d. Short-body spark plug