Payment Policy                                 We only accept payments via PayPal.  All payments must be prepaid, Description:   : High  quality A pair 4 blade Stainless steel assembly 4mm shaft catamaran Double motor Rc boat  (#1722)  prop nut and drive dog with teflon washer is designed for threaded 4MM  cable / shaft rc boat.  The drive dog is stainless steel with grub screw fixing.  The prop nut is Stainless ste and threaded  Stainless ste tube ，Hard shaft  is  included. Apply to : 4 mm shaft assembly racing catamaran Rc  boat A pair Stainless steel assembly : 1,  prop nut  : 2pcs   2,  drive dog : 2pcs    3,  caulking nut : 2pcs   4,  Straight shaft  : 2pcs   5,  teflon washers  : 2pcs 6,  Stainless steel tube  : 2pcs  7,  universal joint coupling :2pcs  ( 4x3.18mm) 8,  4 blade nylon propeller prop : A pair / OD 50mnm  ( Left rotation / Right rotation )      If you want any other size propeller , you can leave a message for me .      OD (  50mm  55mm  60mm )  universal joint coupling ( 4x3mm   4x3.18mm   4x4mm   4x5mm    4x6mm ) Please leave a message to tell me. You need to size. No message transport  4x3.18mm Hard shaft   10cm  Stainless steel tube  5cm Hard shaft   15cm  Stainless steel tube  10cm Hard shaft   20cm  Stainless steel tube  15cm Hard shaft   25cm  Stainless steel tube  20cm Hard shaft   30cm  Stainless steel tube  25cm refund If there is any problem when you receive your parcel, please contact us without hesitate in 3 days. If you are not 100% satisfied with your purchase, simply return the unworn item within 30 days of the item ship date and we will gladly exchange, replace， or refund it inclusive of delivery charges. (All refund should be sent back by our paypal account) Shipping Time & Method:    United States : item transport to the U.S.We use accelerate transportation express.usually 7 to 15 working days.Remote areas will delay the transportation time 20 Working days.Each item have tracking number. worldwide : Item will be shipped within 3 days after payment is cleared.Goods will be sent via airmail . Delivery takes about 25-30 business day (without holiday). All products have been checked and packaged in good condition before dispatch.                                                                                         Tracking number : Your purchase amount more than $18,Then you will get a free items tracking number.( If you shopping amount not reached $18. You can also buy tracking number ,Cost $3 ) Address : Please make sure your address in Ebay is matched with your shipping address before pay. If you would like to change the address, please contact us IMMEDIATELY after your payment.  About Us   Your satisfaction is our first priority. Defective product will be offered exchange or refund. 100% Money back Guarantee. We appreciate your positive feedback. Our system will leave feedback automatically after you pay it. Please leave us positive feedback upon satisfaction of the item. Please email us before leaving negative and neutral feedback. We will try our best to solve the issue.  We will be glad to answer any question you may have, please feel free to contact us at: we do try respond as quickly as possible. Due to time zone difference, please allow 12~24 hours to get your mail replied.