To further distinguish between the part numbers

Fit Trig and start enjoying improved communications on every flight you make

No addition of electrolyte or water ever required for this maintenance free aircraft battery

The pump is self-priming to 24 inches vertical fuel lift

low-stress hardening of the resin

david clark h10 headpad headband g 36 for h10 headsets EFIS To further distinguish between theSuper Soft, Double Foam Head Pad is wider and more tapered with 60% more surface area in contact with your head to dissipate headset weight. Unique center hinge actually lets the head pad "breathe" for greater comfort. Will enhance comfort on all David Clark H10 series headsets.