Confirmed fit on Houser, Walsh, and Teixeira Tech.
Will not fit ARS-FX arms. May fit other brands with a tube ID around 0.800".
Plugs for A-Arms to plug the hole for the lower shock mount. This prevents the a-arm tube from bending when in collision with obstacles on the race course. The shock mount is a low point on the a arm and therefore is subject to damage. This plug also prevents the hole from packing with mud and debris.