Alum Sulfate size 1a
not impregnated size 0
Alum Sulfate size 2a
Alum Sulfate Size 0a
Alum Sulfate Size 3a
not impregnated size 1
not impregnated size 2
not impregnated size 3
non-impregnated Size 0n
non-impregnated Size 2n
impregnated size 0a
impregnated Size 1a
impregnated size 2a
non-impregnated Size 00n
not impregnated size 1n
impregnated Gr. 2
Non-impregnated size 0
non-impregnated Gr. 1
impregnated Gr. 0
impregnated Gr. 1
