Product Details:
2-1/16" Air/Fuel Ratio, Full Sweep, Elec 
Air / Fuel Ratio 
Product # 4975 
Size: 2 1/16" (52.4mm) 
Type: Digital 
Range: Lean-Rich 
Notes: 
Will work with most factory narrow-band O2 sensors. May require model 2244 in the Accessories Section.