Stormguard accessory for Vent-A-Matic 105 and 106 ventilators. Helps reduce impact of wind and rain. Easy to fit, screws included. Upgrades an existing ventilator making it more suitable for use in exposed locations. Designed for use with models 105, 106, RXL, JG, DGS 106 and DGS JG. Manufacturer: RW Simon.