PRICES MAY VARY. Forbidden Body Jewelry metal tunnels are 316L Surgical Steel hollow and lightweight. Polished to a perfect, smooth finish. All plugs measure 10mm (3/8 inch) in length, front to back. Forbidden Body Jewelry gauges for ears are available in pairs by gauge size, and also in 8 piece (4-pairs) "Stretching Packs," grouped by incremental sets of 4 gauge sizes. Forbidden Body Jewelry gauges and tunnels are a perfect gift for Birthdays for your boyfriend or girlfriend, your wife or husba