Get ready for the ultimate DIY roof rack solution - the AVC Transit Single Roof Tower! This tower is perfect for all Ford Transit models with varying roof heights and lengths. Its aluminum construction and powder-coated, slightly textured black finish make it resistant to corrosion. At 4" tall, the tower boasts two 1/4" slotted holes for a secure mount. Simply cut open the factory bolt hole, add butyl tape, and secure the tower using included hardware and add lap-seal over the bolt head. Easy peasy!