They can be used for flue gas, ventilation ducts, etc. Designed to protect pipes from precipitation, as well as to increase traction.
eBay
Outsunny 3x4m Gazebo Canopy Replacement Cover, 2 Tier Top Roof UV Cover Garden Patio Outdoor Sun Awning (TOP COVER ONLY)
Aliexpress UK
Good for use on fireplace exhaust exterior stove pipes to prevent debris and rainwater from entering the chimney. Suitable for both residential and commercial settings, including homes, apartments, hotels, and restaurants.Specification:Color: SilverMaterial: 304 Stainless SteelOverall Size: 244mmx136mm / 9.6"x5.35" (DxH)Bottom Inner Dia.: 160mm / 6.3"Packing List: 1 x Air Vent with ScrewsAdvantage:The chimney cap is made of 304 stainless steel, ensuring durability and resistance to corrosion. The hood screen prevents debris and birds from entering the chimney, while allowing proper ventilation. The cap is designed to fit chimney pipes, making it a perfect replacement for damaged or missing caps.Instruction:Install the chimney cap on the top of the chimney pipe using the included screws.
eBay
1pc Heavy Duty Outdoor Furniture Cover Garden Couch 2 3 4 Seater Bench Seat Cover Oxford Fabric Garden Lawn Patio Cover 89/55cm
Aliexpress UK
Chimney Pipe Cowl. Stainless Steel for Good Weather Resistance. Wall Thickness - 0.5mm. Ø 180 mm / 7.09". Ø 160 mm / 6.30". Ø 150 mm / 5.91". Ø 140 mm / 5.51". Ø 125 mm / 4.92".
eBay
Round Patio Furniture Covers,210D Heavy Duty Outdoor Furniture Covers Table Cover of Windproof, Waterproof, Anti-UV for Garden
Aliexpress UK
For ventilation ducts, chimneys and air extraction hoods. Guards provide maximum protection without compromising chimney performance. Due to the light and screen setting difference, the item's color may be slightly different from the pictures.
eBay
Waterproof Replacement Umbrella Cloth 2/3M Patio Parasol Cover UV-Anti Canopy Cover Replacement Parasol Cover for Balcony Garden
Aliexpress UK
Upgraded Durability: Made of stainless steel, our rain cap is designed to keep your chimney debris-free and well-protected from harsh weather. This chimney vent cover cap is designed in the shape of an umbrella and made of high-quality stainless steel material.
eBay
Real Outdoor Cover for Garden Furniture, Patio Garden Furniture, Rain and Snow Chair Cover, Sofa Table and Chair Dust Cover
Aliexpress UK
Triangle Outdoor Shade Sail Patio Suncreen Awning Garden Sun Canopy 98% UV Block. HEAVY DUTY SUN SHADE SAIL GARDEN PATIO AWNING CANOPY 98% UV BLOCK WATERPROOF. This chimney vent cover cap is designed in the shape of an umbrella and made of high-quality stainless steel material.
eBay
Pull Start Cover Air Filter Covers Shock Absorption Cover for CY Zenoah Engine for 1/5 HPI KM Rofun Rovan Baja 5T 5B 5SC
Aliexpress UK
Chimney Cover is the perfect addition to your outdoor furniture collection. With a vibrant green colour, this cover is made of durable polyethylene material that can withstand different weather conditions. It measures 122 cm in height and 61 cm in length, making it suitable for a chiminea.The cover is designed by Parkland, a trusted brand known for its quality products. It is a standard type of cover that can fit most chimineas. The item comes with a 125cm*235cm*80cn size and is perfect for those who want to keep their outdoor space cosy and protected from the elements.
eBay
Universal Air Filter Protective Cover for High Flow Air Intake Filter Protective Cover Waterproof Dustproof Air Intake Cover
Aliexpress UK
Cap in a box is a chimney cap of full value that fits in. a pizza box. - protects the chimney duct from rain or snow. Material: stainless steel.
eBay
1pc, Sunshade Umbrella Cover, 210D Oxford Fabric Cantilever Parasol Cover Waterproof/Windproof/Anti-UV, Garden Umbrella Cover
Aliexpress UK