Silicone O-Ring S4 3.5x2mm (12) by HPI Racing
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This product was added to our catalog on May 8, 2006.This is a pack of eight replacement shock seal O-Rings for the HPI Hellfire Monster Truck. These are the small O-rings that go into the bottom of the shock body to seal the shocks against the shock shaft and stop the oil from leaking out. When these wear out they should be replaced to stop the shocks from leaking. These O-rings will only work on 3.5mm shocks.