Lavender glass tunnels. Made of light purple borosilicate glass (made in USA), the single flare plugs are smooth for comfortable wear. Overall length is 12mm. Wearable area is +/- 8mm. Choose your size: 8 gauge (3mm), 6 gauge (4mm), 2 gauge (6mm), 0 gauge (8mm), 00 gauge (10mm), 7/16" (11mm), 1/2 inch (13mm). Sold in pairs (2pc).