All post clamps are completely interchangable with all Rail Clamps. Rail Clamps are designed to cover post clamp ears. 
 
Sold Single, Loose or in Cartons. 
Type:
VFT25 Carton of 50
VFT32, VFT40, VFT50 Carton of 40
VFT65 Carton of 30
VFT80, VFT100 Carton of 20