12 Tooth Seed Spacing Gear for Cole No. 40, 41, 42, 43, 44, 45, and 46 Planters.
Referred to in Cole Equipment planter parts catalog as a "twelve point change sprocket" and was used to adjust seed spacing distance.
Cole Manufacturing planter part number 356.
The gear will fit a hex shaft. The hex diameter is 1- 5/16" inch point to point.
The total outside diameter is 5" inch.
Current Cole part numbers may vary from the casting numbers embossed on the actual part.