3M 4 Inch x 106 Inch 400 Grit (A30) 237AA Trizact Belt
The grey colored Trizact belts have a cloth backing so they are a little more substaintial and track a little better with less heat generation on the glass. The colored Trizact belts are a film backed belt so the backing is a little slicker and they ...
- 3M's 237AA Trizact material is an embedded aluminum oxide in a randomized pyramidal structure for quick abrasion to surfaces
- The 237AA Trizact is coated onto a cloth backing for a sturdier structure that requires less pressure for grinding and therefore generates less heat on your glass
- The greater backing pressure allows the belt to break in faster with less pressure from the operator. Adding extra pressure to the 237AA belts will only wear them out prematurely