HOPE Tech 4 Brake Bleed Cap. This cap is part of the HOPE Easy Bleed Brake Bleed Kit for Tech 4 brakes, but can be purchased separately. In case you have another HOPE Easy Bleed kit, e.g. for Tech 3 levers, and you want to continue using it for Tech 4 levers, this is the ideal option. The cap also includes a small expansion tank seal and 2x torx screw M3x8mm. The cap is compatible with an external container that screws onto the cap via a threaded fitting.