•Durable polyurethane foam with 52 vacuum holes and plastic backing made of 70% +/-10% glass fiber + 30% +/-10% epoxy resin, polyamide hook face for sanding disc attachment.
•For use with loop backed discs.
•5/16-24 male thread
•Medium density.
•Low profile.
•Stocked & shipped from the US.
(California Prop 65)