intersec906.htm - Produced by Pellegrini and Associates, Inc. | 134 Spring Street New York NY 10012

EX-99.906 CERT 10 intersec906.htm CERT intersec906.htm - Produced by Pellegrini and Associates, Inc. | 134 Spring Street New York NY 10012 | (212) 925-5151

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 International Fund of BlackRock Series, Inc.
and BlackRock Master International 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 October 31, 2010 (the
“Report”) fully complies with the requirements of Section 15d 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: January 5, 2011

/s/ John M. Perlowski
John M. Perlowski
Chief Executive Officer (principal executive officer) of
BlackRock International Fund of BlackRock Series, Inc. and BlackRock Master International Portfolio of BlackRock
Master LLC

Pursuant to 18 U.S.C. § 1350, the undersigned officer of BlackRock International Fund of BlackRock Series, Inc.
and BlackRock Master International 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 October 31, 2010 (the
“Report”) fully complies with the requirements of Section 15d 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: January 5, 2011

/s/ Neal J. Andrews
Neal J. Andrews
Chief Financial Officer (principal financial officer) of
BlackRock International Fund of BlackRock Series, Inc. and BlackRock Master International 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.