ONE PAIR of 316L Stainless Steel flesh tunnels.

16 gauge - 00 gauge has a 6 mm wearable area.

7/16 inch -3/4 inch  has a 5/16 inch wearable area.

7/8 inch - 1 inch has a 3/8 inch wearable area.

1 1/16 inch - 2 inch has a 6 mm wearable area.

These tunnels have a screw on back piece to hold them in place.