OEM Toyota 1JZ & 2JZ Coolant Drain Plug.
This is the drain/cock plug for the JZ engine blocks. This is located on the exhaust side towards the back of the black and is used to drain all coolant out of the block or if following the correct procedure to bleed as per TRSM.
Note: This product doesn't come in the OEM Toyota packaging as it is sold in bulk quantity.