Caster Block Set 12.5 degrees Aluminium: 22-4Key Features Provide optimal balance with 12. 5 degree of caster at the block. CNC Machined from high quality 6061 T6 Aluminum and hard anodized for ultimately durability Directly fits onto the 22 4 without the need for any other parts or modifications. Overview As the TLR Race Team continues to push the envelope of performance for the 22 4, they have found themselves torn between the advantages of 10 degree and 15 degree caster blocks. We then