This machine is designed to test 2 watches up to 3 atm. Security up to 6 atm. Not sure if the O rings required are included.. What you see is what you get. THANKYOU & GOOD LUCK…. PLEASE CHECK MY OTHER AUCTIONS FOR MORE CLOCK & WATCH TOOLS. The item “Bergeon 5555 Watch Waterproof Pressure Tester Watch Clock Tool Parts or Repair” is in sale since Wednesday, August 30, 2017. This item is in the category “Jewelry & Watches\Watches, Parts & Accessories\Parts, Tools & Guides\Other Watch Parts & Tools”. The seller is “clockatwo” and is located in Swansea, NSW. This item can be shipped worldwide.