Comparison : |
Item # TNRW1.21.20, Triangle Negative with ISO Style Hole, thickness 0.104 / 0.112 in Item # TNRW1.21.50, Triangle Negative with ISO Style Hole, thickness 0.104 / 0.112 in Item # TNRW1.220, Triangle Negative with ISO Style Hole, thickness 0.135 / 0.143 in Item # TNRW1.81.50, Triangle Negative with ISO Style Hole, thickness 0.104 / 0.112 in Item # TNRW1.820, Triangle Negative with ISO Style Hole, thickness 0.135 / 0.143 in
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