This Schumacher Racing Products Speed Pack provides a set of four 9.0x1.6mm O-rings intended as factory replacement seals for Schumacher RC vehicles. O-rings in this size are commonly used to seal shock absorbers and other fluid-retaining components, helping maintain consistent damping performance. Sold in a pack of four, having spares on hand is practical for regular maintenance or rebuild sessions. Features: 9.0x1.6mm O-ring dimensions Pack of 4 For shock and fluid seal applications Schumacher Speed Pack replacement part 7/7/26 cs