These silicone O-rings they help seal the BLITZ gear diffs from dirt and leakage. They can also be used as an upgrade part for Firestorm and E-Firestorm gear diffs for a better seal than the stock X-ring (#86898). Each package contains 10 O-rings.
Spare Part Type:
109326 HPI Blitz Flux RTR
115125 HPI Savage XS Flux Ford Raptor
115458 HPI WR8 3.0 Nitro Ken Block Intergalactic Ford Fiesta ST RX43 RTR (2015)
115383 HPI WR8 FLUX Ken Block Intergalactic Fiesta ST RX43 RTR