4 inch screw steel & nylon brush/filament for nylon abrasive brush/stone polishing brushes/abrasive brushes/abrasive grinding brushes

Diam 110mm abrasive brushes for antique stone surface.
Diam 110mm abrasive brushes used in hand machine for grinding and polishing Marble,Granite,sandstone.
The brushes are made of Dupont Tynex A filaments.
Grits:steel,36#,46#,60#,60#,120#,180#,240#,320#,500#,800#,1000#.                         

Model no.: LSST40023

Type:M14,M16,5/8-11                
Package:12 pcs/box,36 pcs/nox,72 pcs/box.              
Weight:0.2 kg /pc
Filaments: 30 mm