This LG microwave part (model # 4810W1A151A) is an air duct, specifically an exhaust damper. Use this part to replace a damaged or worn out air duct in your LG microwave. It is compatible with various LG models and is perfect for those who need to repair their microwaves. 
This is also a whirlpool part listed under the part number WB34X35371
TESTED AND FULLY FUNCTIONAL.
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SOME COMPATIBLE MODELS:
LMHM2237ST-L-G
LMV1760ST -L-G
LMV1762SB -L-G
LMV1831SB -L-G
LMV2031SS -L-G
MVEM1825F
MVEM1825D
MVGV1640.CE1EGEU-L-G
MV1645G.CB8EGEU-L-G