The Somfy 9020674 is a crown and drive kit for the Somfy's Sonesse 30 WireFree (st30wf) and ultra WireFree (ST30UWF) series motors and allows the motor to be used in rollease 1.5" shade tubes. The rubber drive of the kit has grooves that match the tube's internal profile allowing the tube to be turned by the motor without putting a screw through the tube. Easy installation.
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