The Graviti™ Blocks were developed to be used to retain soil as a replacement for gabion baskets and boulder walls. Graviti™ Blocks are a smart and cost effective alternative to the old fashioned Gabion cages or basket. Gravity Wall Systems Pty Ltd, PO Box 191, Ballina, NSW 2478, Ph: 02 6687 7465, Fax: 0414 382 921, Web: www.gravitywallsystems.com