Harav Hagaon R' Benzion Wosner's Hechsher (PDF-Hebrew) Harav Hagaon R' Benzion Wosner's Hechsher (PDF-English) Harav Hagaon R' Yecheskel Roth's Letter (PDF-Hebrew) Harav Hagaon R' Yecheskel Roth's Letter (PDF-English)