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Used to ensure clearance to combustibles is maintained. Also serves as a firestop. Adjusts from 4-1/8" to 7" to fit thickness of wall. Type B gas vent.
| Id | 19110 |
| SKU | 429307 |
| PartNo | 187704 |
| UPC | 00053713130380 |
| Country of Origin |  USA |
| Wall Thickness | 4-1/8 In. - 7 In. |
| Size | 4 In. |
| A Size | 4-5/8 In. |
| B Size | 8-1/4 In. |
| Material | Galvanized Steel |
| Temperature Rating | 550 F |
| Grade | UL Listed |
| CID | 1 |