a: 170
b:

Roclon Muslin , New England Quilt Supply
Roclon-5114
Roclon 120 Muslin, Unbleached
Roclon-5115
Roclon 120 Muslin, Bleached
Roclon-5125ROT
Roclon 90 Muslin, Unbleached, ROT
Roclon-5128
Roclon 108 Muslin, Bleached