This is a pack of two replacement Yokomo YR-X12 Push Rod Springs. These springs are identified by their gold marking and feature a volume of 3.5. These are the springs included with the YR-X12.  
Available Push Rod Springs: 
- YOKYX-39SG: Gold 3.5 Volume (kit) 
- YOKYX-39SS: Silver 4 Volume 
- YOKYX-39SB: Black 4.5 Volume 
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