Singularity Computers SC Stop Plug

The Singularity Computers Stop Plug is for use on Protium D5 Pump Tops, this includes Protium D5 ?? Reservoir Combos which come included with the Protium D5 Pump Top. This is a hidden Stop Plug which has nothing protruding outside of the port. The purpose of the Stop Plug is so that our Universal Backplate can be mounted on three sides of the Protium Pump Top without a Stop Fitting preventing this due to its height.