Where to Use Chimney Pots of any size where Seagulls are a nuisance. How it Works The prominent stainless steel spikes prevent the Seagulls from landing and nesting. How to Install Each strap is 1.2 metres (4ft) long, so it will wrap around every size of chimney pot (for smaller pots the strap simply overlaps like a belt, or it can be trimmed down to size)The protruding pins are 200mm (8 inches) high and have a diameter of 2mm. The pins and strap are attached together and are made from the finest quality stainless steelThis amazing bird repellent strap is simply wrapped around the top of any shape or size chimney pot. It will prevent birds from landing without hurting them.Can be used on square chimney pots too.