Gel Ear Seals for David Clark H10-60 H10-20 H10-13.4 H10-76 H10-30 H10-13S and all other models that match this shape and size, does not include H20-10. Also fits PilotUSA SkyLite Flightcom and CRAZEDpilot CP-1 and CP-1ANR, CRAZEDpilot child headsets and hearing protectors. Comfort-Gel ear seals with undercut design have 60 percent more surface area in contact with your head, are 26 percent lighter and allow 30 percent more interior room for your ears for quieter, more comfortable flights. Will enhance comfort on all David Clark H10-series headsets and hearing protectors. Sold in PAIRS. Yes, they are a TIGHT fit - you want it that way. INSTALL QUESTIONS - Watch our Installation video on our website. These Gel Ear Seals are a huge upgrade for your older headset, or your aviation headset that uses air cushion seals. Gel Seals are extremely comfortable - you really need to try them to believe it. These are a low cost upgrade to your headset which will drastically REDUCE pilot fatigue and IMPROVE the fit of your aviation headset.