Comparison : |
Item # 1687, 4 Inch (in) Size of Tube/Sleeve Zone Control Damper Tube with Power-Open/Power-Close Modulating Motor Item # 1688, 5 Inch (in) Size of Tube/Sleeve Zone Control Damper Tube with Power-Open/Power-Close Modulating Motor Item # 1689, 6 Inch (in) Size of Tube/Sleeve Zone Control Damper Tube with Power-Open/Power-Close Modulating Motor Item # 1690, 7 Inch (in) Size of Tube/Sleeve Zone Control Damper Tube with Power-Open/Power-Close Modulating Motor Item # 1691, 8 Inch (in) Size of Tube/Sleeve Zone Control Damper Tube with Power-Open/Power-Close Modulating Motor
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