| Comparison : |
Item # ER2, U-Notch Style Flat Top, thickness 0.162 / 0.168 in
Item # ER3, U-Notch Style Flat Top, thickness 0.207 / 0.213 in
Item # ER4, U-Notch Style Flat Top, thickness 0.270 / 0.275 in
Item # ER5, U-Notch Style Flat Top, thickness 0.396 / 0.404 in
Item # ER6, U-Notch Style Flat Top, thickness 0.397 / 0.403 in
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