The 25mm x 760mm (1" x 30") belt is a common size for Hobby Belt Grinding/Sanding machines.
The 50mmx1830mm (2"x72") size is a common size for Knife Grinding machines. 3M Trizact Cloth Belt 237AA uses proprietary microreplication technology where micron-graded aluminium oxide particles are formed into tiny pyramids of abrasive mineral and then coated on an X weight cloth backing.
3M 237AA Trizact is a 3M Specialty "Structured" abrasive that is ideal for fine finishing
Self-sharpening pyramids start sharp, stay sharp, and run cooler than conventional abrasives
Flexible backing for consistent finish over contours
Designed to save production time with fresh cutting surfaces continually exposed, resulting in extended belt life, reducing frequency of belt changes
The price shown is per belt.