Description: 【Material】: The 01232023 Firewall Pass Through for Wiring Harness is made from aluminum alloy, ensuring its robustness and longevity. 【Accurate Design】: The Firewall Pass Through Bulkhead Wiring Harness features a 1 1/8 inch hole and a 3/4 inch hole, catering to different needs. 【Easy Installation】: The Firewall Pass Through for Wiring Harness consists of two halves that need to be bolted together Four holes around the perimeter allow for attachment to the vehicle with four bolts. 【Convenient Usage】: The top half of the bracket can be removed, providing ample space for installing or removing wires. Simply bolt it together and reinstall the vehicle bracket bolts as needed. 【Size】: With dimensions of 3.72inchx2.09inch, this Firewall Pass Through is compact and portable. Specification: 9.45cmx5.3cm/3.72inchx2.09inch Package Includes: 1 Set Firewall Pass Through for Wiring Harness Note: Please allow slightly errors 1-2cm differences due to manual measurement.