Features:

• Smooth inside hole of 0.65'' that allows anything that size or smaller to pass through the firewall or other location, prevents from rubbing to prolong the service life of the harness.
• Specially designed to put our aftermarket K Series engine harness through your firewall neatly. 
• Made of billet aluminum

Includes:

1X Firewall Grommet (including all necessary mounting hardware)

Fits:

For Honda Civic For Acura Integra EG EK EF DC2

Perfectly Fits Our Engine Harnesses Without Integrated Power Wire

If you are using Engine Harness With Integrated Power Wire you will have to open the hole up slightly to clear the larger harness.

Note: 

This will cover holes between 1.05" to 1.25".