Defender Plastic Narrow Bird Spikes 6 Metre Pack Bird spikes are an effective and humane solution for keeping birds away from the desired area, as it simply discourages landing . The plastic spikes are easy to install and will have an instant effect without causing any harm to the bird. This method can prevent issues such as a build-up of unsightly droppings, potential noisy bird calls and can stop areas being used for nesting . The Defender range has a variety of products to protect all areas of your home. The Defender® Plastic Narrow Bird Spikes 6 Metre Pack contains everything needed for you to protect ledges from landing and perching pigeons and similar sized birds. This product is ideal for narrow ledges and window sills with a depth of up to 10cm . Installation is made simple with an included installation guide and a supplied tube of Defender® Fixing Silicone which can be applied with a caulking gun. Features: Easy installation - comes with a 285ml tube of Defender® Fixing Silicone which will adhere to metal, plastic, brick, stone, wood and most other surfaces. A step by step instruction guide is also included for a quick and easy setup Quality guaranteed - the product comes with 15 Year Defender® Warranty Certificate UV protected - the spikes are made from a UV stabilized polycarbonate Discreet appearance - the spikes are virtually unnoticeable once installed, leaving you to enjoy your home and garden as it should look Informative material - includes a 40-page guide to deterring pigeons and other birds Specifications: Height: 39cm (15.3in) Width: 21cm (8.26in) Depth: 5.5cm (2.1in) Contains 18 Strips Measuring: 33.3cm (13in) Strips Combined Length: 6m (19ft 7in) Suitable For Ledges With A Depth Of: Up To 10cm (3.9in)