Product pack: 5 metre Defender gutter bird spikes (11 x 333 MM strips) Plus 45 page Defender seagull and pigeon deterrent guide and a 15 year warranty certificate suitable for: these Defender gutter bird spikes will stop seagulls, pigeons and other similar sized birds from roosting or nesting in gutters or hoppers. Easy to install: The pre assembled gutter bird spike simply clips onto the outer edge of half round or square gutters. They are positioned above the base to allow for the free flow of water. Made in the UK: We are the UK manufacturer of Defender gutter bird spikes. Jones & son pest control supplies, has developed, patented & manufactured these bird deterrent spikes in Devon, UK. High quality: The gutter spikes are made from UV stabilised duplon polycarbonate plastic and come with a 15 year warranty. Guide to pigeon & seagull control: a 40 page book on everything you need to know about bird, seagull and pigeon control, the law, installation and warranty certificate.