From the mouth of Denny Zager Jr himself: 'My father sets up all of his guitars with our own Zager brand custom light 11-48 gauge but we have customers using all brands and gauges with excellent results. We do have many customers who were users of other brands move to the Zager brand after using them as they’re specifically designed by Denny exclusively for his guitars.' 11-48 is a pretty standard range of string gauges for an acoustic guitar, though this should not matter too much as the string height itself is adjustable on the fly.