The Adams Rite 31-0619 is the Circuit Board that controls the Motorized Latch Retraction on the 8000 and 3000 Series Exit Devices. It is also known as the PCBA: SE Main (Black).
Adams Rite 91-0993-IP 8700/8800 Strike is used on the rim devices that have the Star Wheel Latching System. The strike measures 2-3/4" long by 1-3/4" wide and projects out approximately 1/2". Kit comes with mounting screws and two shims.
The Adams Rite EL8600 Solenoid 31-0833-IP is used on their Concealed Vertical Rod. It uses 28 VDC. If your Solenoid is Red or White, then you would need the EL8800 Solenoid.
On this Adams Rite End Cap we sometimes find the number HX0471 cast into the Black Plastic construction. It measures 2-3/8" high by 1" deep, with a projection of 1-1/4". It is used on the 8099, 8100, 8200, 8300, 8400, 8500, 8600, 8700, 8800 and 8900.