Please select the desired part from the following possible matches:

S-MBGA-8X12-72-A, BI SKT(6BG8X12) (PKG 10X8MM)
S-MBGA-8X12-72-A1, BI SKT(6BG8X12) (PKG 12X8MM)
S-MBGA-8X12-72-A2, BI SKT(6BG8X12) (PKG 14X8MM)