Parts Unlimited Part number: PU-3807-0221 Qty. 1 2 3 4 5 6 7 8 9 10 Add to Cart Spark Plug Gap Tool - (3807-0221) Lang - is currently on backorder. You may still purchase now though and we'll ship as soon as more become available. Lang Spark Plug Gap Tool - (3807-0221) Details: Spark plug tool measures spark plug gap in graduated ramp sequence Sizes: SAE .020-.100; Metric .60-2.40mm Universal spark plug gauge Made in the U.S.A.