Velcro discs & PSA Discs:

They are fixed on hard rubber plate of pneumatic or electric tools, used for polishing surfaces of wood, primer, metal or stone.
 

Materials:           Brown Fused Alumina (A),  
                            or Silicon Carbide (C);
Holes:                 no hole, 1 hole, 5 holes, 
                            6 holes, 8 hole, 8+1 holes, etc.

 

 

Sizes:
 

Abrasives

Size

Grit

Holes

None

1 hole

5 holes

6 holes

8 holes

8+1

hole

Brown Fused Alumina

100mm

A40#

  

  

A2000#

115mm

125mm

150mm

180mm

Black Silicon Carbide

100mm

C40#

  

  

C2000#

115mm

125mm

150mm

180mm