Comparison : |
Item # 1629, 4 Inch (in) Size of Tube/Sleeve Zone Control Damper Tube with Power-Open/Spring-Close Motor Item # 1630, 5 Inch (in) Size of Tube/Sleeve Zone Control Damper Tube with Power-Open/Spring-Close Motor Item # 1631, 6 Inch (in) Size of Tube/Sleeve Zone Control Damper Tube with Power-Open/Spring-Close Motor Item # 1632, 7 Inch (in) Size of Tube/Sleeve Zone Control Damper Tube with Power-Open/Spring-Close Motor Item # 1633, 8 Inch (in) Size of Tube/Sleeve Zone Control Damper Tube with Power-Open/Spring-Close Motor
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