So far no one has had to pay any extra fees or duties. At the delivered price of $5.63/sheet, it's not the cheapest, but still less than a sheet of depron that has fewer sq.in. Compared to Readiboard, it's almost twice the area (8sqft vs 4.1sqft) and only a little over twice the price/sheet. Ok, sales pitch over Find suppliers of Foam Sheets in India. Get latest price of Foam Sheets. Foam Sheets विक्रेता and आपूर्तिकर्ता. Get contact ... Polystyrene (PS) / ˌ p ɒ l i ˈ s t aɪ r iː n / is a synthetic aromatic hydrocarbon polymer made from the monomer styrene. Polystyrene can be solid or foamed. General-purpose polystyrene is clear, hard, and rather brittle. Depron / Bio-foam need in Delhi NCR - India's open forum for RC flying, planes, helicopters, aeromodelling, cars and hobby stores Not as ridged as depron , little bit floppy but layer of packing tape makes it nice & strong! sands well just like depron but be gentle when sanding. Finer grit sand paper will do a good job. I did some comparison by weighing the sheets. 700x500x5 mm sheet weighs about 57g which gives 0.0164g/cm2.