Unlike most string, Poly Speed Spin is not round. With its pyramid like shape (picture the tooth on a gear) this string offers exceptional bite and access to spin. This one is a great choice for power players looking to add more kick to groundstrokes and serves. Poly Speed Spin is very durable and offers a nice firm, control oriented feel with little string movement. IMPORTANT SHIPPING INFORMATION l We do not ship to Alaska, Hawaii, Puerto Rico, APO/FPO and Outside of US at this moment; DO NOT BUY it if you are in above location. l Adult Signature will be required in order for the package to be delivered (we do this in order to prevent minors from purchasing airsoft guns without their parents authorization) TERMS OF AGREEMENT- By placing a bid or a buy it now for this auction you the buyer agreed to all terms and conditions stated on this page and understand the terms , including shipping and handling, transit time , payment policy, and return policy fully.