The Gardner Tackle Flatliners are a set of plastic controller floats designed specifically for carp fishing, freshwater fishing, and coarse fishing. The floats are buoyant and come in three sizes - 13g, 20g, and 30g. The green colour of the floats makes them easily visible in the water, while the Gardner brand ensures quality and reliability for anglers looking to attract and catch various species of carp, such as grass carp, carp, and mirror carp. Ideal for those looking for a durable and effective float to enhance their fishing experience.