8400-K17-Opto: 1 or 2 Optogenetics Tethered Mouse Headstage KitThe headstage kit is used with the optogenetics mouse system (8400 K15). The kit includes headstage and all necessary one time purchase accessories, as well as enough surgical supplies disposables to complete initial surgeries. All kits include the following (quantities are 1 unless otherwise noted): 7033: Bio Only Mouse Headmount (6) 8209: 0. 10" Mouse Screws (3 pkgs. of 8) 8241 F: Screwdriver for Mouse Screws 8241 M: Flathead Screwdriver 8254: 23