BERLIN (Reuters) - Germany aims to purchase six IRIS-T air defence systems for its air force at a total cost of some 900 million euros ($971.73 million), a defence source told Reuters ahead of a final decision by lawmakers on Wednesday.

So far, Berlin has bought two IRIS-T units built by Diehl for Ukraine and pledged to send another two systems to Kyiv, but has not equipped its own forces with it yet.

Boasting a range of some 40 kilometres (25 miles) and a 360 degree view, the IRIS-T SLM system is one of the most coveted of the weapons that Berlin has supplied to Kyiv.

($1 = 0.9262 euros)

(Reporting by Sabine Siebold, Editing by Rachel More)