Job lot of ten (10) Easyvent 3000 agate grey/painswick external trickle vents made Acrylonitrile Styrene Acrylate (ASA), a much tougher and durable plastic than PVC. ASA has an outstanding resistance to weathering, ageing and yellowing, meaning it will keep its glossy finish for a long time. Easyvents are so called as the vents are indeed easy to fit These are agate grey/painswick external only
eBay