To accomplish the task of creating an affordable T bar with the same fabrication and welding, Affinity went back and rethought their material choice. Instead of using 4130 Chromoly they opted for a more cost effective yet strong material. This material is called DOM steel. Both Chromoly and DOM steel are used standard in roll cages, and are both approved by the NHRA.
Height: 710mm / 28"
Width: 610mm / 24"
Material: DOM Steel
Outer Diameter: 31.8mm for Standard size. 34.9mm for Oversized.
Compression Compatibility: SCS Only for both Standard and Oversized.