They area designed to fit a standard drainage hole used by many manufacturers.
eBay
3M/5M/10M Door Window Sealing Strip Soundproof Brush Seal Elastic Straight Hair Sealing Strip Door Window Etc Seal Weather Strip
Aliexpress UK
Ideal for uPVC, wood & aluminium windows. Enhance the ventilation in any room with the Trickle Slot Vents Window Ventilation. Premium quality vent to help reduce condensation and allows secure ventilation.
eBay
4Pcs 77/88 type Push-pull Window Pulley Zinc alloy Double Wheel Balance Adjustment Angle Wheel for Sliding Door Window Cabinet
Aliexpress UK
Features: – fits to be installed to any plastic profile – no need to open the window to ventilate the room – no street noise and air drafts – Manual adjustment of air feed volume – Note! The installation of the window vent flapper does not require changes in profile. There is no need to drill a window!!! The principle of functioning: Fresh air from outside enters the channel between the frame and the sash in place of replacement of a fragment from typical seal to a special one. Then the air goes through a valve mounted on top of the flap and enters the room. Pls contact us for price and large quantities.
eBay
6M/lot I-D Type Silicone Rubber Sealing Strip For Door / Window Sound Insulating Strip Self-adhesive Tape Window Insulation Seal
Aliexpress UK
They area designed to fit a standard drainage hole used by many manufacturers. Sold in single units. 21mm between legs Centre to Centre.
eBay
Skylight Window Opener Input Voltage 110V/220V Electric Window Actuator Stroke Adjustable
Aliexpress UK
A robust, smooth, slim, elegant, and modern rounded external trickle ventilation hood featuring an integral flyscreen. External Trickle Ventilation Hood (Hood Only). External Trickle Ventilation Hood Only.
eBay
1 Set Fuel Tank Breather Vents Air Check Valve Bushings Kit for Most Chinese Chainsaw Brush Cutter 4500 5200 5800 45cc 58cc 52cc
Aliexpress UK
Surface Mounted Trickle Vents.
eBay
22/24mm 2M Exhaust Glass Fiber Hose Lagging Insulation For Webasto Eberspacher Exhaust Pipe Tube Gas Vent Hose Car Truck Parts
Aliexpress UK
They area designed to fit a standard drainage hole used by many manufacturers.
eBay
2PCS Engine Air Outlet Cover Trim Front Engine Hood Vent Trim Perfect Match Glossy Black for Cooper S R56 R55 R57 R58 R59
Aliexpress UK
430mm White Trickle Vent. Our most popular trickle vent is the low-profile flush-fitting trickle vent. Many trickle vents on the market are obtrusive and detract from the clean lines of a window. Our Flush-fitting vent is almost invisible when fitted.
eBay
2 Sets Chainsaw Oil Seal Fuel Tank Vent Set For 4500 5200 5800 45cc 52cc 58cc Skeleton NBR Gasket Chain Saw Garden Accessories
Aliexpress UK