Acrylic in piercing mostly used for plugs and tapers. Due to the material's slipperiness, it is widely used for stretching. A flesh tunnel is a hollow, tube-shaped variety of body piercing jewelry. It is also sometimes referred to as a gauge. A flesh tunnel is usually used in stretched or scalpelled piercings. Flesh tunnels are fashioned from a broad range of materials, including surgical steel, titanium, Pyrex glass, silicone, acrylic glass, bone, horn, amber, bamboo, stone, and wood. Flesh tunnels, like flesh plugs, may feature a decorative inlay or semi-precious stones. Some flesh tunnels have flares to keep the jewellery from falling out. If there are no flares, grooves may be cut near the edges to allow rubber or silicone o-rings to hold the jewellery in place. The back of the flesh tunnel may also screw off. A flesh tunnel may also have an internally threaded backing, as externally threaded pieces can rip freshly stretched ears. JEWELRY TYPE IN STORE : Belly Button Navel Ring , Barbell Bars , Captive bead rings , Circular Curve Industrial Spiral barbells , Labret Monroe , Nose ring , Fake ear plugs , Flesh tunnels , Single Double flared , Expanders , Jewelry for Cartiliage Helix Tragus Eyebrow Nipple Nosetril Tongue piercing , Earrings and Etc. OUR GAUGE CHART : 8g = 3mm , 6g = 4mm , 4g = 5mm , 2g = 6mm , 0g = 8mm , 00g = 10mm , 1/2" = 12mm , 9/16" = 14mm , 5/8"= 16mm , 11/16 = 18mm , 3/4 = 20mm , 7/8" = 22mm , 1" = 25mm SHIPPING INFORMATION : We ship all package directly from our factory in Thailand. Estimated Delivery Time: 7-15 days from date of shipment. Shipments are made within 3 days. Gift wrap available at checkout. Each piece of your jewelry item(s) will be carefully packed in a nice package. CONTACT US : If you have any question or some reason you feel unhappy with our products, please contact us.We resolve 100% of all disputes, responding to all questions and inquiries within 24 hours.