Clay chimney pot and pepper cowl - clay, they look pretty old.
eBay
4pcs PVC Handrail End Cap Round Stair Treads Cover Fittings 45mm Handrail Stair End Cap Wood Rail Sealing Covers Plugs
Aliexpress UK
eBay
Sink Overflow Ring Cover Bathroom Sink Hole Cover Basin Trim Cap Bath Sink Drain Cap Wash Basin Plug Bathroom Accessories
Aliexpress UK
3~102.5mm Black White Soft Silicone Rubber Round End Cap Dust Seal Protection Gaskets Pipe Cover Caps Round Tube Insert Stoppers
Aliexpress UK
3mm~102mm Silicone Rubber Round End Cap Black Dust Seal Protection Gaskets Pipe Cover Caps Round Tube Insert Stoppers
Aliexpress UK
Silicone Rubber Round End Cap Black/White 2.8mm~78.5mm Dust Seal Protection Gaskets Pipe Cover Caps Round Tube Insert Stoppers
Aliexpress UK
1PC Sink Overflow Cap Sink Basin Overflow Trim Ring 22-24mm Double Layer Vanity Sink Overflow Cap For Kitchen Sink
Aliexpress UK
64mm Ferrule O/D 2" Tri Clamp Stop Cap 304 Stainless Steel Sanitary End Cap Sanitary Homebrew Pipe Fitting
Aliexpress UK
201/304 Stainless Steel Pipe Cap Hole Plug Seal Cover Round Tube Plug Decorative Cap For Pipe Hole Sealing&Multiple Sizes
Aliexpress UK