Ofna servo linkage kit has throttle servo arm and linkage parts made of colorful orange plastic. This linkage setup allows for smoother throttle and brake operation. Package includes, 1- X shaped orange servo arm, 2- orange servo arm adapters (for JR ,AIRTRONICS and FUTUBA radios), 1- 1.5x140mm rod with threading on one end, 1- pink plastic ball cup, 1- spring, 4- 2mm inside diameter collar w/set screw, 1- 15mm neoprene tubine and 1- 3x18 black allen head screw.