E55751 is a key used on 1214, 1380 mower conditioners, and 125 skid steer loader. Specifications from Deere:
Width=.250 inches
Length=2.000 inches
The parts book references I have are:

1214 Page 14 Key 14
1380 Page 17 Key 13

Our prices include shipping. If you are ordering more than 1 item use coupon code “Sambucks10” for 10% off. Please feel free to email us with your questions.

Click To Enlarge
  • Item #: E55751
  * Marked fields are required.
Price $5.00
Availability In-Stock
# Available 1