Exceeds all ISO/ADA specifications High Quality Stainless Steel Hand use Blister card packing 10 pieces/blister in working lengths of 21mm Color coded, ISO colors & sizes CC-Cord Handle Sterile About 40 Flexible barbs are spirally arranged on the coned shaped core The size of the barbs corresponds to half of the core diameter The delicate barbs are resilient and will not break in the canal if used properly Sterilizable up to 200 C /390 F