How long does it take to manufacture UE Pro Custom In-Ear Monitors? Follow Our normal turn around time is 7-10 business days from the time we receive your impressions and order. Related articles What if I experience intermittent or lack of sound? UE 5 PRO Can I just add a custom fit tip to the universal in-ears that I’m currently using instead of buying a custom IEM? Can I really use in-ear monitors to mix or produce projects outside of my studio? What material are your custom in-ears made of?