Convenient single application, 12 bottles. SAE Certified and OEM Approved. Works on all Automotive A/C Systems. Detect leaks as small as 1/4oz per year. From the recognized leader in the UV market Uview designs, manufactures and delivers the most innovative and functional products to the automotive repair industry. This fast, convenient and cost effective UV Dye is used to pinpoint leaks in A/C systems. There are 12 bottles of universal A/C dye, and the service stickers are included.