AirSoft® Reusable Earplug, Thermoplastic Elastomer, Blue Red, Uncorded ORS NASCO Precision tools made of rust Precision tools made of rust proof aluminum and anodized for lasting protection The arms are precisely aligned with spring tension joints to guarantee accuracy and rigidity The holder accommodates flat or round soapstone and pencils All are a folding type design non scoring surface for use as gaskets and packing Solid braided cover with cotton core Non spliceable tapered shape fits better in the ear canal Firm stem facilitates easy insertion and removal Four flange profile creates better seal in the ear canal Less pressure in the ear canal eliminates that “plugged up” feeling Advanced air pocket design features internal noise blocking fins Rounded flanges