GB-100 is a ratcheting buckle for incremental tightness. 

Pulling strength rating - 90 pound force

Buckle material - metal with coating

Length of strap - 8 inches (~20cm)

Effective length (with teeth) - 6 inches (~15cm) 

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GB-200 is a low profile ratcheting buckle 

Pulling strength rating - 60 pound force

Length of strap

Length of strap - 8 inches (~20cm)

Effective length (with teeth) - 6 inches (~15cm) 

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GB-400 has a Y shaped strap

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