1.Size:12-325mesh1-3,2-4,3-5mm 2.Color:gray.green, ... ,alkali-resistan 2.Specification:Perlite sand(unexpanded perlite,raw perlite ):12-16mesh,14-20mesh,16-32mesh,20-40mesh30-50mesh,50-70mesh ... ,70-90mesh ,90-120mesh 150mesh,200-325mesh 1-3mm 2-4mm ... Tel:8613582186358 Perlite(raw/unexpanded)18-20mesh 30-50mesh50-70mesh ,70-90mesh ,90-120mesh