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LMZ14201: LMZ14201TZ-ADJ/NOPB Radiator appearance

Part Number: LMZ14201

Hello!

LMZ14201TZ-ADJ/NOPB, TEXAS INSTRUMENTS

We received  these parts, up advance visual inspection we could identify the bellow discrepancy

The radiator has an uneven plastic coating
Could you tell me pls Is this a defect?