The Bulletz are slow rebound memory foam in ear tips (available in small, medium and large) for many popular in ear monitors. Dekoni Audio has now expanded on that line, offering tips for true wireless in ear headphones. While true wireless users loved our Mercury tips, most could not fit inside their charging case. Dekoni's TWS series fits inside most true wireless cases. The thread size is the same as Mercury at 4.9mm. It fits a wide range of true wireless models and is compatible with Powerbeats Pro, Sony XM4, JBL, Jaybird, Jabra, Sennheiser Momentum, Fostex TM2, and many others. The Bulletz series was released in 2017 as an answer to non silicone ear tips having no way to safely be cleaned. All of our memory foam ear tips are washable with cold soap and water. Dry with a paper towel and good as new!