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1-7/16" burner sight glass round SG-510
1-7/16" furnace burner sight glass round SG-510
Fireproof burner sight glass round 1-7/16" diameter

1-7/16" round burner sight glass SG-510

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Fireproof replacement furnace burner sight glass measures 1-7/16" in diameter.  This is our small size.  We also sell two other sizes.  Medium size is part # SG-511 and our large size is part # SG-512.

Also available separately for this site small glass is a slip-ring nut (SN-500) and a high-heat gasket (G-180).