Replacement shock cord for indoor rowers with chains that either do not recoil or recoil slowly between strokes.This is 12 feet and 6 inches long elastic shock cord/bungee cord recoils the chain on recovery. Color may vary between White or Black.

Used on the Following Models Listed Below.  
Concept II-
Model C
Model D Indoor Rower - After 07-19-12 - Black
Model D Indoor Rower - After 07-19-12 - Light Gray
Model D Indoor Rower - Before 07-31-2006
Model D Indoor Rower - Between 07-31-06 & 07-19-12 - Light Blue Gray
Model E