Jack Guard Mesh is multi-purpose galvanised mesh with a unique design that keeps out small animals and deters larger animals with its height. Primarily designed as a tree guard, it has many useful applications on farms and in gardens with its unique graduated pattern. Vertical pickets are at 100mm spacings. Note: It is recommended that new galvanised wire mesh used in aviaries and pet cages be treated to remove excess zinc that could possibly harm pets. Shave off any zinc spikes with a utility knife. The mesh should then be scrubbed with a mild solution of vinegar (2 cups in a bucket of water), and rinsed with clean water.