Part#: 20-4D-SG] sight glass for trane model m, includes o-ring
Copeland: 520-0006-00, 998-0002-03 / Carrier: KM39BN-010 / Trane: GLS-30
Supplier: Rota-lock valve,sight glass,ball valve,drier filter,oil Separator, liquid receiver, copper drier filter, service valve....Etc refrigeration parts
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