Diamond Pro is perfect for those heavy duty garden retaining walls up to 1.2 metres high* depending on existing ground conditions. Firth Diamond Pro offers all the advantages of cast in place, timber, stone and crib walls – but with a very important difference. An integral rearlip speeds installation, eliminates guesswork and reduces labour costs by automatically delivering a quick uniform setback. Bevelled splits (Straight face can also be made to order) make it easy to construct 90 corners and terraces. Unsurpassed design flexibility includes cap and corner units. Dimensions are: Standard unit: face width of 450mm, height of 200mm and depth of 300mm Corner unit: face width of 450mm, height of 200mm and depth of 225mm Capping unit: face width of 450mm, height of 100mm and depth of 300mm