Columbia Throttle Box bullnose roller while keeping it aligned in

while keeping it aligned in the corner

Once installed

the Matrix gives you increased control over your box

Fastest way to coat corners

Columbia Throttle Box bullnose roller while keeping it aligned inThe Throttle Box is another great product of ours that offers years of great performance. All billet construction with a threaded stainless steel ball, this Corner Box looks and operates seamlessly. All our Corner Boxes now come standard with automatic capabilities, making pushing the box at least 50% easier than standard boxes. The new springs have adjustable tensions and greatly reduce the occurence of air pockets while running. The Throttle Box