Yes, the Shatter Termite Bait Cartridge
will fit the Sentricon Stations. If they took all the bait out and the stations are empty, I would recommend refilling the stations with the detector wood
first or make your own detector wood. Then inspect the stations every 3 months or so and when you find active termites, remove the detector wood and insert the Shatter cartridge. It only takes 1-2 Shatter Termite Bait Cartridges to kill an average termite colony. You don't need to bait every single station. The cost is too high and not necessary. Hope this helps.