This Associated factory replacement caster and steering block set is made for the RC10 B7.1 and is molded from carbon-loaded composite material for added rigidity on the front suspension. The set includes multiple caster block and steering block combinations, with left and right pieces marked with KPI and degree values so you can dial in your preferred geometry. Individual pieces are labeled for easy identification during setup or rebuild. Features: Carbon-loaded composite construction Left and right pieces included for front suspension KPI and caster degree markings molded into each block Multiple geometry options included in one set 7/7/26 cs