The 100x915mm (4"x36") belt is a common size for Belt Sanding machines such as Clarke, Sealey, Axminster, Scheppach etc. as well as the more versatile 100mm wide Multitool MTA-364.
 
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.