This is a replacement Spektrum Servo Gear Set. These gears are compatible with the Spektrum S300 and H310 servos.
Please allow 2-3 days for your order to be processed and shipped. You will be notified of the shipment tracking number via the e-mail address you have provided us when the package has been sent. Currently, we will only ship to the address that matches the billing address registered to your credit card. Trying to create an order with a credit card that doesn't match your delivery can result in the cancellation of your order.