Bioflex labret stem 16g or 14g by 19mm (3/4 in.) long and 45mm (1 3/4 in.) long. Cut to fit. Flatback available in 3mm or 4mm. Cut bar with sharp scissors or blade to shorten to appropriate length. Purchase Bioflex push on ball or o-ring separately. Or use steel ball to thread the stem and use any acrylic ball.