Columbia Throttle Box bullnose roller Split wheel design - Harden

Split wheel design - Harden stainless steel & tough Delrin wheels eliminate drag on tape

Fastest way to coat corners

while keeping it aligned in the corner

Pet Proof - Flat with no crevices or grilles for our furry friends to get caught in

This model can be spray painted as you please

Columbia Throttle Box bullnose roller Split wheel design - HardenThe 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