Marine grade stainless steel split rings, probably among the most used by saltwater fishermen, Owner's Hyper Wire,
The wide range of sizes will actually cover many different applications. Size #5, #6 and #7 are mostly used for light saltwater use or freshwater medium. From size #8 up we have the specific SW split rings being #10 and #11 for tropical use.
Units per bag:
# 5 - 9 units
# 6 - 8 units
# 7 - 7 units
# 8 - 7 units
# 9 - 6 units
# 10 - 6 units
# 11 - 5 units