Amonax Ab Wheel Roller with Large Knee Mat for Core Abs Rollout Exercise. DoubleEffective Core Trainer - Portable and lightweight design for Abs training in the gym or simply use at home. Build strength and definition to your abs, ready for the summer! Dual Mode - Wider stand of ab roller gives more stability and control, especially helpful for beginners. Rollout with confidence using our robust wheel frame and extra thick solid metal bar. Single Mode - Simply switch the direction of the wheels to have a narrower stand for more advanced and challenging abdominal exercise, transforming your ab into a stunning six pack. Premium Quality - Our Knee Pad and Handles are made of premium yoga mat material known as TPE. It provides stronger support yet softer touch. Stay comfortable while your core burns! - We provide 2 years warranty to ensure the long-time enjoyment of your purchase. Please contact us with any questions or concerns - we are to help. Payment DetailsWe currently accept payment via PayPal only. Once payment is cleared, we will dispatch your shipment within 1-3 business days. Please refer to the "Shipping" tab for more information regarding shipping speed to your destination.Return PolicyAs our valued customer, we will do our best to make sure the product you receive arrives to you on time and as expected. If you are not satisfied with your purchase, please contact us within 30 days of receiving your order to process a return.