Both of the B+W's come in aprotective plastic case with padding. According to the b+W website:
•Absorbs Ultraviolet Light •MRC Multi-Resistant Coating •Reduces Bluish Cast of Daylight •General Protective Filter •Slim-Line Mount for Wide Angle Lenses •Rugged Black Brass Filter Ring •High Quality Schott Glass
I also have for sale a Hoya HMC 77mm Skylight (1B)- asking $30
Reduces the excessive bluishness that frequently occurs in outdoor color photography, especially in open shade under a clear, blue sky. The absorption peak is in the range which corresponds to the film's green spectrum. This means outstanding outdoor shots with superb color balance and clarity under all conditions. Also keeps skin tones free of colored reflections from nearby objects such as the shade of trees.
All three enhance the sky and will also protect your lenses.
I will look at offers, especially if you want two or all three filters.