Now you can add piece of mind as well as advertising to your A/C Service. These handy access port covers prevent unwanted tampering of the A/C system after you service your customers system. Covers fit over 1/4" Flare access ports or Low & High Side Automotive ports. Made from heavy duty, non-adhesive shrink tube, they are easily applied with a heat gun and easily removed for service. Imprint your Company name and phone number on each cover to ensure repeat business when ever the system is inspected. Protect your warranty. Color Options Are: Red, Black, White, Green, Blue, Yellow. Use colors to indicate High / Low side or even yellow or green for Dye or oil type as well as White for R-12 applications. 100 count package with a 500 count minimum. Any amount can be ordered in 100 Packs after the first 500.