The Securitron SFP MM15 stands for stop filler plate. What this helps with is filling or extending a doorstop. It creates a flat mounting surface for the magnalock. There are six different models, three different sizes in two different colors. The ½” models are the SFP-1/2BKMM15 which come in black anodized and the SFP-1/2CLMM15 which comes with a clear anodized finish. The next size up is the 3/8” models which are the SFP-3/8BKMM15 in the black finish and the SFP-3/8CLMM15 with the clear finish. Lastly, the 5/8” models are the SFP-5/8BKMM15 with the black anodized finish and the SFP-5/8CLMM15 with the clear anodized finish.

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