Check the listing for details. The MacHack V2 The Original Broken Hinge Solution 27 iMac Fix Repair 2012-2018. Condition: New. Listed at 21.99 USD. US Patents 9,927,062&10,161,559 B2This is my original invention, not the cheap Chinese knock off (that violates my patents listed above) being sold on eBay. I am an American seller, please support domestic small business.This is an update to my original invention that I started selling in 2016. I’ve sold thousands of that design and am now offering this new updated design. My feedback speaks for itself. This works on all 27”2012+ iMacs. If you have a 2009-2011, I make one for that too just send me a message and I will take care of you! Just slide this on the monitor stand, set your screen in the desired position, adjust the arm to rest against the back of the monitor and tighten the knob to lock it in place. Set it and forget it! If you ever need to adjust the viewing angle just loosen the knob and make whatever adjustments you need. No International Shipping.