Storm insert tape. 1 inch, 50 sheets. Used for thumb hole adjustments. You can use it as is, or cut it thinner for fine adjustments. Some people may think 1 inch is too thick, but if you cut it yourself, you can make 3/4 inch and 1/4 inch, or 1/2 inch in two pieces... it's convenient(^^) (I have a lot of swelling and shrinking in my fingers, so I cut it thin for fine adjustments^^;) Immediate purchase is OK. Please refrain from negotiating discounts on this item only m(__)m