This is ARC Low Arm F/R Set (Hard).
Ultra hard composite nylon arm set for R10 Series Cars. Not only it is harder than standard arms but also lighter, it provides very well response and better corner speed in high grip surface, It also remains the same hardness during hot temperature. Both Front and Rear Arm Mark “H” on the arm,easy to identify. Sell in 1 front and 1 rear arm,plastic shims included.