1.processed from rubber 2.best resilience 3.density: 30kg/m3 ~130 kg/m3 ect, Size:2mx1mx10mm, 15mm,20mm,25mm,30mm,50mm, ect ... .processed from PE material2.best compressible 3.density: 30kg/m3 ~130 kg/m3 ect, Size:2mx1mx10mm,15mm;20mm,25mm,30mm,50mm, ect ... Strength (min. p.s.i.)20Elongation (min.)60% PE 33kg/m3 60kg/m3 110kg/m3 130kg/m3 Closed Cell Joint Filler Board