This is the Shock Bladder (4pcs) For the HPI Racing WRI and Bullet Series Black rubber Four shock bladders The HPI Racing Bullet Series includes Bullet ST Flux 2.4GHz RTR (HPID7008) Bullet MT Flux 2.4GHz RTR (HPID7010) Bullet ST 3.0 Nitro 2.4GHz RTR (HPID7004) Bullet MT 3.0 Nitro 2.4GHz RTR (HPID7006) This part set can also be used for the 1/8 WR8 3.0 F0RD Fiesta Rally Abu Dhabi RTR (HPID6949) 6/6/12 pjw ir/jxs &