Exhibit 99.1350CERT
Certification Pursuant to Rule 30a-2(b) under the 1940 Act and
Section 906 of the Sarbanes Oxley Act
Pursuant to 18 U.S.C. § 1350, the undersigned officer of BlackRock Small Cap Growth Fund II of BlackRock Series, Inc. and
BlackRock Master Small Cap Growth Portfolio of BlackRock Master LLC (the “registrants”), hereby certifies, to the best of
his knowledge, that the registrants' Report on Form N-CSR for the period ended May 31, 2009, (the “Report”) fully complies
with the requirements of Section 15(d) of the Securities Exchange Act of 1934, as amended, and that the information contained
in the Report fairly presents, in all material respects, the financial condition and results of operations of the registrants.
Date: July 15, 2009
/s/ Donald C. Burke
Donald C. Burke
Chief Executive Officer (principal executive officer) of
BlackRock Small Cap Growth Fund II of BlackRock Series, Inc. and BlackRock Master Small Cap Growth Portfolio of BlackRock
Master LLC
Pursuant to 18 U.S.C. § 1350, the undersigned officer of BlackRock Small Cap Growth Fund II of BlackRock Series, Inc. and
BlackRock Master Small Cap Growth Portfolio of BlackRock Master LLC (the “registrants”), hereby certifies, to the best of
his knowledge, that the registrants' Report on Form N-CSR for the period ended May 31, 2009, (the “Report”) fully complies
with the requirements of Section 15(d) of the Securities Exchange Act of 1934, as amended, and that the information contained
in the Report fairly presents, in all material respects, the financial condition and results of operations of the registrants.
Date: July 15, 2009
/s/ Neal J. Andrews
Neal J. Andrews
Chief Financial Officer (principal financial officer) of
BlackRock Small Cap Growth Fund II of BlackRock Series, Inc. and BlackRock Master Small Cap Growth Portfolio of
BlackRock Master LLC
This certification is being furnished pursuant to Rule 30a-2(b) under the Investment Company Act of 1940, as amended, and 18
U.S.C. Section 1350 and is not being filed as part of the Form N-CSR with the Securities and Exchange Commission.
Blackrock Series
Filed: 6 Aug 09, 12:00am