Stellalyre Adjustable Support Wheels Auxiliary Wheels For Gas String Trimmer Adjustable Support Wheels Product Features Liberate the body?Holding tools for a long time can cause sore hands and shoulder pains. Using this pulley can easily solve these problems;This item does not fit a curved pole. Flexible design: The height of the support wheel can be adjusted according to your height, can be raised or lowered, making your weeding work easier. General Accessories?Perfectly suitable for most backpack mowers on the market. Suitable for 26mm and 28mm shaft tubes. Height adjustable?According to the user's height and the needs of the use scene, the height of the support wheel can be adjusted at any time. After-sales service? If you have any quality problems, please contact us. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!