| Brand | DUCO® |
| Type | Sight Glass |
| Item Diameter | 5/8" |
| Item Length | 6-3/4" |
DUCO ® 'CLEAR' Sight Gauge Glass (5/8" OD x 6-3/4" Long) with 2 EPDM Gaskets. Steam boiler service working Pressure Material: Premium EPDM (holds up to 302 ºF, 150 ºC). Sight Glass Specifications.