Frando radial master cylinder... a legit one, not one of the cheap copies. Used on Isle of Man TT racers. Comes with brake banjo switch, and resevoir. Tube included but not pictured. Mounted on bike and bled, but never actually used. 17mm size. Price is in USD, shipping included. I've used these a lot over the years -- 15mm on my Duke 690 racebike, 19mm on my zx7R classic racer with 4-pot tockicos. Going with a single front disc on my next project so this is surplus to my needs. Price new from UK distributor: https://www.ebay.ca/itm/202597873222?hash=item2f2bc63646:g:fRgAAOSwNwhcZqG~ Customer review from KTM forums: https://www.ktmduke390forum.com/threads/front-brake-upgrade.23938/