BL 4x4 (100mm x 100mm) boxed Medium Hoop & Grid fits Sofia BL137A2 BL1
BL 4" x 4" (100mm x 100mm) boxed, Medium Hoop & Grid, fits Sofia BL137A2, BL137A, INT and like models
BL 4" x 4" (100mm x 100mm) boxed, Medium Hoop & Grid, fits Sofia BL137A2, BL137A, INT and like models