
All I did was cut a 2 1/2 inch diameter hole at the mounting post location and then cut it out with a utility knife. The ventilation hole is screwed on and clamped on both sides. insert a bushing into my post but I knew that would be the case. Very good value for money and easy installation.

170 Piece First Aid Kit - Hard Case & Lightweight, Emergency Supplies For Travel, Home, Office & Outdoors
30 Review

IDRYBAG Dry Bag Backpack Waterproof Floating 20L/30L/40L, Dry Bags Waterproof Backpack For Men, Dry Sack Waterproof Bag Kayak
39 Review

Boat Fenders - Polyform G Series
34 Review

Computer chair AeroCool Duke gaming, upholstery: faux leather/textile, color: punch red
66 Review

Maddogยฎ Sports Padded Chest Protector, Tactical Half Glove, & Neck Protector Combo Package
23 Review

Hornady Black Diamond By Umarex - Improved Product Name For Enhanced Search Engine Optimization
28 Review

OneTigris Tactical Half Face Mask: Foldable Mesh Protection For Women & Teens - 4.5 Inches
23 Review

OneTigris Multicam Helmet Cover For Fast Helmets In Size M/L And L/XL - Protect Your Headgear With Cloth Cover In Multicam Print
31 Review