SDI LIMITED — Earnings Release 2007

Jul 31, 2007

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June 2007 Trading Update

SDI Limited today announced that sales for the year ending 30 June 2007 were $48.6m compared to $45.2m for the same period last year, this represents a 7.5% increase.

The Company expects that, subject to audit clearance, it will deliver an after tax profit in the range of $4.0m to $4.2m.

SDI expects to release its final audited full year results on 20 August 2007.

For further information please contact:

Gerry Bullon INSOR Investor Relations 0418 106 675

1 August 2007