Seco 75080771 Milling Cassettes, SP Insert, Face Mill Indexable Mill, Insert Compatibility: SPEN 1906ZETL-MD20/SPEN 1906ZETR-D25/SPEN 1906ZETR-MD20/SPEN 1906ZZTR-D25/SPEN 1906ZZTR-MD20/SPER 1906ZETR-M17/SPER 1906ZZTL-M17/SPER 1906ZZTR-M17