Guaranteed to fit Husqvarna Viking sewing machine models:
Designer Diamond, Designer I ESS, Designer I USB, Designer Ruby, Designer SE, Designer Topaz 20, Designer Topaz 25, Designer Topaz 30, Designer Topaz 40, Designer Topaz 50, Eden Rose 250C, Sapphire 835, Sapphire 850, Sapphire 855, Sapphire 870 Quilt, Sapphire 875 Quilt, Sapphire 930, Tribute 140C

Guaranteed to fit Pfaff sewing machine models:
Creative 2.0, Creative 3.0, Creative 4.0, Creative 4.5, Creative Performance, Creative Vision 5.0, Creative Vision 5.5, Expression 150, Expression 2.0, Expression 3.0, Expression 3.2, Expression 3.5, Quilt Expression 4.0, Quilt Expression 4.2, Quilt Expression 720