These â€œVersion 3â€ caster block sets have been updated for extra strength. The new design comes standard on the D817 V2 and E817 V2 buggies and they fit most HB Racing 1/8 buggies. Theyâ€™re available with your choice of 15 degrees, 17.5 degrees, and 20 degrees of caster to help dial in your suspension to track conditions. Theyâ€™re machined from aluminum for high strength, and anodized black. Degree markings are laser etched on the blocks for quick and easy identification.