Replacement seat top compatible with Dynamic indoor rowers with 12 Inches wide, 10 Inches deep, 1.5 Inches thick, with contours for pelvic bones and tailbone. Four mounting screws included. This seat can also be used to replace more basic seats.

Used on the Following Models Listed Below. 
Concept II-
Model A 
Model B
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

Replacement seat top compatible with Dynamic indoor rowers with 12 Inches wide, 10 Inches deep, 1.5 Inches thick, with contours for pelvic bones and tailbone. Four mounting screws included. This seat can also be used to replace more basic seats