Hereditary deafness is one of the most common human birth defects. GJB2 gene mutation is the most genetic etiology. Gap junction protein 26 (connexin26. Cx26) encoded by the GJB2 gene. https://www.diegojavierfares.com/hot-deal-Cobra-Fly-XL-Graphite-Mens-Right-Hand-Package-Set-Regular-Fly-XL-save-more/