This double sided background is black on one side & green on the aquatic garden display. Printed plasic background attach to the back of the aquarium. These backgounds are superb & when fixed using the Clearview background fix offer an excellene effect. Available in 18 inch (45.5cm) Cut to length in-store from a roll. Priced per 10 cms. Measure aquarium & order in multiples of 10cm. Example; aquarium 80cms long, order quantity 8. Note that the height doesn't need to be exact because the gravel will cover the lowest part of the back of the aquarium. The cut section will need final trimming with scissors. This price is for 18 inch high by 10 centimetres