For Sale Today... Genuine Echo / Shindaiwa KNOB part # A235000270 Part A235000270 (THUMBSCREW) Where Used: · CS-490 S/N: C34312001001 - C34312999999-- Intake, Air Filter, Engine Cover · CS-490 S/N: C34413001001 - C34413999999-- Intake, Air Filter, Engine Cover · CS-501P S/N: C36712001001 - C36712999999-- Intake · CS-501P S/N: C36813001001 - C36813999999-- Intake WE ARE A CERTIFIED DEALER!! Our main priority is to get you a genuine echo part with fast shipping and good communication. We value our feedback. It is how we represent ourselves . If you wish to return the item you purchased, you will be responsible for the shipping cost to send it back to us. When we receive the returned product, we will credit your account the full purchase price less the actual shipping cost. If you'd like to exchange an item that you purchased, you will be responsible for the cost difference and the shipping cost for the new product. Please be advised that we do not ship on weekends or holidays. If you purchase an item on Friday, Saturday or Sunday, it will be shipped on the next business day. shows an estimated ship time, that is exactly what it is...ESTIMATED! We will ship it within our time frame stated but cannot always depend on the shipping carriers. Thank you! Be sure to add me to your favorites list! Check out my other items!