Throttle Body Idle Adjusting Screw Kit - FTO 1.8 GS DE2A The screw is made of a hard type of brittle bakelite plastic, the aluminium has a nasty habit of corroding around it and it gets stuck in the hole so you end up destroying the screw head trying to adjust the idle. The o ring fits on the top of the screw. Kit Consists :- 1. Adjusting Screw 2. O'Ring For Throttle Body Exploded Diagram Click HERE Mitsubishi Part Numbers MD614948 Screw MD608806 O ring