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Best Choice New Bayliss Greenhouse AUTOVENT XL BAYLISS GREENHOUSE AUTOVENT XLNew Automatic Greenhouse Window Opener Autovent with Opening Force 7KG Opens from 17-25C Easy to install and does not need electricity as it uses the heat from the sun.Best Value New Leafy Creations Silver Greenhouse Window Opener Automatic. Temperature Controlled Greenhouse Accessories Auto Vent. (Bla Silver greenhouse window openers suitable for Aluminium and Wooden frames.New Leafy Creations Black Double Spring Heavy Duty Greenhouse Window Opener Automatic. Temperature Controlled Greenhouse Acc Black double spring greenhouse window openers suitable for Aluminium and Wooden frames. Extra strength for durability anNew Speedwellstar Greenhouse 25KG Window Vent Opener 2 Spring Automatic up to 25 kg load Solar Auto Heat Sensitive Kit Twin This opener will automatically open and close your greenhouse window to control the temperature insideNew Piston for Greenhouse Vent Opener 15Kg Lift Automatic Window Cold Frame Cylinder Replacement piston for your vent opener with 10mm screw thread (please check you existing piston).New Matymats 2Packs Heavy Duty Greenhouse Window Opener Automatic - Single Spring Up to 33lbs, Heat Sensitive Automatic Gree Smart Temperature Control Switch: Matymts greenhouse window openers are self-sufficient, running without batteries or elNew Leafy Creations Replacement Piston for Greenhouse Window Openers Automatic. Temperature Controlled Greenhouse Spares for If your greenhouse automatic window opener has stopped working, simply replacing the cylinder will restore it to normalNew Woodside XL Solar Heat Sensitive Automatic Single Spring Greenhouse Window Vent Opener AUTOMATIC VENT OPENER – The Woodside Automatic Vent Opener is ideal for keeping greenhouses at the perfect temperature.New Automatic Window Opener - Bayliss Easy to fit, screws into wood and clamps onto aluminium greenhouses without the neeed for drilling