| Comparison : |
Item # ONR320, Negative Octagon, thickness 0.137 / 0.143 in
Item # ONR420, Negative Octagon, thickness 0.135 / 0.143 in
Item # ONR430, Negative Octagon, thickness 0.202 / 0.207 in
Item # ONR630, Negative Octagon, thickness 0.198 / 0.206 in
Item # ONR640, Negative Octagon, thickness 0.260 / 0.268 in
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