HI UP FOR BID IS A TIF 9600 HEAVY DUTY AC MANIFORD GAUGE SET TIF 4-WAY 65mm GLYCERINE NEW NEVER BEEN USED. I HAVE 3 SETS THIS SET I NEVER USED. BRAND NEW JUST NO BOX. DESIGN FOR CFC/HCFC SUCH AS R-12, R-22,R-502 I ALSO HAVE A SET I USE FOR 134A. IF YOU USED THEM FOR A DIFFERENT I freon IWOULD RECONMEND USING DIFFERENT HOSES OR FLUSH HOSES BEFORE USE WITH DIFFERENT FREONTO KEEP FROM CONTAMINATION TO FREON SYSTEMS. THEY ARE GLYERINE THIS WILL GIVE YOU A STEADY READING NOT A BOUNCING READING . WHEN NOT IN USE KEEP GAUGES OUT OF SUN . I SEEN GAUGES WITH GLYCERINE TURN A DARK COLOR FROM THE SUN I KEEP MIND IN EITHER  A CASE OR BLACK COVER AND THEY WILL STAY LIKE NEW. I WAS A MASTER ASE TECH. FOR OVER THIRTY YEARS. AND THOSE GAUGES ARE THE BEST I EVER USED AND OWN AND THE MOST ACCURATE. THEY ARE NOT SOLD BY TIF ANYMORE MORE THEY BECAME TO EXPENSIVE TO MANUFACTURE. SO A LOT OF TECH BROUGHT CHEAPER INEXPENSIVE CHEAPER GAUGES BUT AS THE SAYING GOES YOU GET WHAT YOU PAY FOR . THIS SET COMES WITH GAUGES PICTURED, SET OF 4 HOSES BLUE FOR LOW SIDE, RED FOR HIGH SIDE, YELLOW FOR FREON TO BE ADDED, AND BLACK TO VACUUM SYSTEM COMES WITH R12 FITTINGS. IF YOU WANT TO USE THEM FOR ANY OF THE FREONS YOU JUST HAVE TO PURCHASE THE ADAPTERS WHICH YOU CAN GET ON EBAY OR AMAZON. IF YOU WOULD EVER NEED GLYCERINE YOU CAN GET  IT ON AMAZON. LIKE I SAY WHEN NOT IN USE KEEP OUT OF THE SUN. THEY WILL LAST YOU A LIFETIME.MY FIRST SET I BROUGHT FROM SNAP ON TOOLS THEY COST ME OVER 500.00 DOLLARS25 YEARS AGO IF YOU COULD  BUY THEM TODAY AT TODAYS PRICES THEY MORE THEN LIKELY DOUBLE THAT.FOR ANY OTHER QUESTIONS PLEASE EMAIL THANKS.