The bag adapter is designed to fit the Outer Bag assembly for various Sanitaire Tradition Series upright vacuums SC679, SC684, SC881, SC886, SC888 and SC899. Also compatible with Eureka models; C2094D, C2094E, C2094F, C2194A, C2194B, C2031B, C2031BM, C2031D, C2031E, C4046B, C4046E, C4046D.