These are genuine part number chips for Callaway fairway woods currently on sale. Please check the third photo as an example of compatible models. Please check if it is compatible with the headcover you are using. For those who have lost the number chip for their headcover, For those who purchased a used club and the headcover did not come with a number chip, we will provide them. [About Shipping] We will ship as regular mail. Depending on the timing of your purchase, shipping will be according to our schedule, and there may be rare occasions where shipping takes more than 3 days due to absence from home. If you wish for anonymous delivery, we can accommodate this by adding the difference in shipping costs, so please let us know in the comments. We will inform you of the planned shipping date via comments or transaction messages. We will do our best to deliver as soon as possible, but please understand. Please understand that this is a used item, and we do not accept cancellations or returns after shipping. Callaway headcover number display chips, 13.5, 15, 16.5, 18, and 20 - Model: 135 15 18 - Model: 165 20 - Brand: Callaway Thank you for looking.