The O Ring(d:2.5,id:13.8) is the most widely applied product in the LT-A700X KING QUAD 2005 (K5) USA (E03) KINGQUAD KING-QUAD REAR BRAKE ( two times ).
A sample from the products for the Rear Brake include: Pedal,brake, Bolt, Pin, Nut.
The component with the lowest price in the REAR BRAKE schematic is the Bolt.