Alumino-silicate Cenospheres, Fillite is a glass hard, inert, hollow silicate sphere. Fillite is primarily used to reduce the weight of plastics, rubbers, resins, cement, etc., but also imparts further benefits in many situations. Over 60,000 products with FREE DELIVERY including Laptops, Desktops, Apple, Dell, Tablets. Talk to us about your business needs in any Currys or PC World Cisco SG500-28P 28 Ports Manageable Ethernet Switch SG500-28P-K9-G5. ... installation guide or datasheet please contact us and we would be happy to help.Description Alloy AS5048-P has been discontinued, please use alternative Alloy AS5052-P. The Alloy AS5048-P Layer 3 Lite Managed Gigabit POE+ Switch consists of 48x 10/100/1000Mbps Gigabit Copper UTP Ports and 4x paired dual speed 1000M/100M SFP Ports.