... noise .3. fireproofing,no sands pollution ,strong decorative ,easy to construct , high environmental protection etc ,and it’s the popular ... more expensive than ordinary sponge, (how to identify good and bad sponge,if it's to press down hard, if quickly rebound, ... contracted term.Support & re-ordering.Our Service:Your inquiry related to our product & price will be replied within 24hoursWell-trained & ...