Material: aluminum alloy+plastic Products include: 1x inflator, 4x universal connector Procedure: 1. Select conical head fixed claw according to the thread of antifreeze bottle (external claw is selected for internal thread, internal claw is selected for external thread, and then rotate the blue knob to adjust the height of the knob to achieve fixed conical head) 2. Fix the cone head on the air cylinder link, and conduct pressure and leak detection (press to the pressure specified by the vehicle manufacturer, and press 1.5 bar if there is no clear value). If the pressure drops, Nemo represents that there is a leak in the cooling system. Find out the specific location and repair it in time Return Policy All of our items come with a 30-day free return policy. If you need to return, please contact us, let us know the detailed problem and send us some pictures for confirmation. We reserve the right to refuse any returns for objective reasons. Shipping Policy All of our items are shipped free with tracking numbers. Orders will be shipped within 3 working days upon receipt of payment. Most orders will be shipped within 1 working day. In most cases, shipping takes 8-12 working days.