The 50mm x 2000mm (2" x 79") belt is a common size for Knife Belt Grinding machines. 
 
The patented friable ceramic grain used in Norton Red-X R976 Ceramic abrasive provides a consistent sharp cutting action, allowing lower working pressure. The super size layer releases heat generation and risk of burn.
Good consistent cut rate even at low and medium pressure
Excellent belt performance on medium to hard contact wheels
Low heat generation reduces risk of burn
Excellent on various material types; from Stainless Steel to Inconel to Titanium
Reduce your cost per part
 
The price shown is per belt.