4 OEM Thule Caps only for Thule tracker 2 bases that come preinstalled on toppers truck caps from Leer etc

Factory sealed

Came with LEER XR100 topper

These caps protect the stainless pins the Thule crossbars attach to on bases

Carwashes and tree limbs can knock off

Protect your investment

I attaches pictures of current Yakima roof rail caps for context. These Thule caps work same way