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Please note: this is NOT a pull station cover - it is a polycarbonate "spacer" that allows you to mount a pull station cover (such as the STI-1100 or STI-1200) over a surface-mounted pull station. To purchase a pull station cover that already has the "spacer" included, please see the STI-1130 or STI-1230 Pull Station Covers with Spacer.
The STI-3104 is a 2" conduit spacer with 3/4" conduit entry (includes one 3/4" conduit entry gasket). The clear conduit spacer adds two inches of depth to the Stopper II and Weather Stopper series products. It has conduit knockouts on the bottom and top with filler pieces to fill conduit cutouts when no exposed conduit to mount over.