They can be used for flue gas, ventilation ducts, etc. Designed to protect pipes from precipitation, as well as to increase traction.
eBay
4PCS 20 Inch HubCap for Tesla Model Y 2020-2024 Cyclone Style Automobile Hubcap Replacement Wheels Cover Full Rim Accessorie
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
4PCS HubCap Car for Tesla Model Y 19 Inch Performance Wheel Cap 2025 Juniper Wheel Parts Full Rim Cover Accessories Wheel Cover
Aliexpress UK
Designed to prevent rain, birds, vermin and leaves entering used or unused chimney flues. this cowl is suitable for woodburning, solid fuel and oil burning appliances This product provides good ventilation and gives protection against wind and rain.
eBay
Hedge Fuel Tank Cap Multitool 49cc Trimmer 52cc Various 55cc Brush Chainsaw Cutter Fits Petrol Plastic Scooter Fuel Tank Cap
Aliexpress UK
Birdguard and chimney pot cap cowl for keeping out rain and birds like Jackdaws. ONLY connects to chimney pots (will not connect to any kind of flue pipe). SEE PHOTOS FOR SIMPLE FITTING INSTRUCTIONS.
eBay
20Pcs 17/19/21mm Car Nut Silica Gel Covers Wheel Nuts Screw Bolt Decorative Tire Wheel Tyre Screw Cap Wheel Nut Caps Anti Rust
Aliexpress UK
Simply place it over your chimney flue and enjoy knowing your chimney is protected. Stay worry-free and keep your chimney in top condition with this chimney cap. 1x Fireplace Chimney Cap. Garden Structures & Shade.
eBay
24Pcs 17MM/0.66in Wheel Nut Bolt Trims Studs Cover Cap Black For Opel For BMW Plastic Wheel Nut Cap Replacement Parts
Aliexpress UK
Chimney cowls to fit single wall flue pipes manufactured in the UK in galvanised steel for good weather resistance. Designed to fit over the end of a single wall rigid flue pipe and to be drilled and screwed on.
eBay
Winter Warm Cap Hip-hop Thicken Skullcap Casual Beanie Hat Women Men For Harley Davidson 86-92 FXRT/86-90 FLST/88-17 FLSTC/94-17
Aliexpress UK
LENGTH OF COWL 20 CM. MATERIAL - Steel - coated with black heat proof paint up to 6 00°C. HS, IV 41 to 49, IV 51, 55 & 56. KA 27 & 28, KW 15 to 17. PA 20, PA 41 to 49, PA 60 to 78, PH 42 to 44. Isle of Man (IM), Channel Islands.
eBay
Car Tire Valve Stems Cap Knurling Style Tire Valve Cap For Seat Leon 5f Ibiza 6l 6j Leon 1p Cushion Altea Xl Leon Mk Accessories
Aliexpress UK
Rain Cap with Bird Guard for Shieldmaster Twin Wall Flue System. Crafted with ease of use in mind, Shieldmaster utilises a secure push fit connection which when connected with the provided locking band, creates a sealed joint between all parts.
eBay
AUTCOAT 4/8Pcs Dice Tire Valve Stem Caps, Universal Plastic Dice Car Tire Valve Stem Air Caps Cover for Car/Bicycle/Motorcycle
Aliexpress UK