Gamma alumina powder

we are an industrial group , our activity in this field oil and gas and catalist,
so at present we need to Gamma Alumina power (high purity) with following specification

Purity : 99.9%
Bet : 250 ~ 300 m2/gr
Partical Size : 1 Micron
Bulk density : 0/5 ~ 0/6 Gr/cm3
Pore volume : 600 Ml/kg