This product fact sheet was originally drawn up in English. Please refer to an automatic translation of the same into Italian below. 14x Harley Davidson Shovel Head Valve Calter Carbide 3-Angle Tip Cut Kit. 3 corner cut as original seat. 30 degrees 45 degrees 60 degrees. Grinding in the following sizes. 45 degrees + 90 degrees. 30 degrees + 90 degrees. 3 PC Steps 3/8 “_ 11/32″ _ 5/16. 3pcs Guide Valve Hone Ramer 3/8 “_ 11/32″ _ 5/16. Feel free to ask any questions.