Product Description Expanded Perlite locally produced is white powdery material extremely light in weight and composed of minor air-tight bubbles, made by crushing perlite (glassy igneous sand) into certain particle size and rapidly heating it for expansion. Expanded Perlite comes from volcanic lava.It is a kind of amorphous, glassiness volcano that contains crystalline water inside. For expanded perlite has low density and low heat conductivity characters, it is widely used in construction and manufacturing fields,lightweight plasters and mortars, insulation, ceiling tiles and filter aids. In horticulture, it makes composts more open to air, while having good water-retention capacity. It is good carrier for soilless plant.Since last few years,expanded perlite is more and more popular in cryogenic use FAQ 1) How can I place order? A: You can contact us by email about your order details, or place order on line. 2) How can I pay you? A: After you confirm our PI, we will request you to pay. T/T (HSBC bank) and Paypal, Western Union are the most usual ways we are using. 3)How do you take care when your clients received defective products? A: replacement. If there are some defective items, we usually credit to our customer or replace in next shipment. 4)How do you check all the goods in the production line? A: We have spot inspection and finished product inspection. We check the goods when they go into next step production procedure.