Locking Gas Cap for 50cc QMB139 engine based Sunny style scooters. Outer diameter of locking tabs: 35mm Includes 2 keys Important Parts Notice: Not all replacement or upgrade parts come with instructions. It is the customer s responsibility to have common knowledge of the installation or hire an experienced installer. We are not responsible for any damage that may be caused by any of the items we sell whether installed by you or a professional. We are not required to provide step-by-step instructions or technical support. In any case we will always do our best to help you with any technical question you may have. Electrical parts are non returnable and the buyer assumes all risks. Copyright © 2017 A to Z Parts Inc. All rights reserved.