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Seal-K Kosher Certification
29 E Madison St, STE 1818,
Chicago, IL 60602
Email: info@sealk.org
Phone: 312.584.5500
Seal-K Shatnez Lab
Rabbi Dovid Zirkin
Shatnez – Lab testing
6707 N Whipple St.
Chicago, IL 60645
Email: shatnez@sealk.org
Phone: 773.715.7780
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