Suffix "E" meaning for 657-15ABPE Heatsink and its Dimension Tolerance

[aayushi.nainwal]

657-15ABPE is a Wakefield Thermal 25X38MM heatsink.
The “E” in the part number signifies ROHS-compliant plating. The tolerance value is ±0.20 for dimension 0.156 and ±0.13 for dimension 1.000 in the drawing.