Borosilicate Glass Single Flare Tunnel - Cobalt Blue
Borosilicate Glass Single Flare Tunnel - Cobalt Blue
4.86/5
18 in stock
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Add a bold and vibrant touch to your jewelry collection with our Cobalt Blue Borosilicate Glass Single Flare Tunnels, sold in pairs. These beautifully handcrafted tunnels are made in the USA from durable, high-quality borosilicate glass, ensuring a comfortable and lightweight fit for stretched ears.
The deep cobalt blue color exudes sophistication, while the polished glass surface enhances its sleek and modern appeal. Featuring a single flare design, these tunnels offer easy insertion and come with a removable O-ring for a secure hold, making them perfect for both new and experienced stretchers.
Features:
- Premium Borosilicate Glass: Strong, lightweight, and smooth
- Vibrant Cobalt Blue Hue: A bold and striking color for any look
- Single Flare with O-Ring: Easy to wear and secure fit
- Handcrafted in the USA: Superior quality and craftsmanship
- Comfortable for Daily Wear: Lightweight for all-day use
- Sold in Pairs: Perfectly matched for a cohesive style
Upgrade your stretched ear jewelry with these Cobalt Blue Borosilicate Glass Single Flare Tunnels, designed for those who love unique, high-quality body jewelry with a standout aesthetic.
Materials
Materials
When compared to regular glass, borosilicate is safe for initial piercing, resistant to chemicals, scratch- resistant, less susceptible to fractures, resistant to thermal shock, and not poured into molds. All our glass jewelry is handcrafted in St. Louis, Missouri.
Care Instructions
Care Instructions
MM Glassworks strictly uses borosilicate glass that is hand made in the USA. Borosilicate Glass is scratch resistant but still fragile and should be treated as such. All glass is guaranteed to arrive scratch and breakage free. We will package each order in a foam insulated box free of charge. Borosilicate glass is autoclavable. Do not use harsh chemicals on any jewelry. Do not wear in the shower or while swimming. Wash with antibacterial soap, but take caution while removing; glass will break if dropped on tile or cement.
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Some of the best glass tunnels around. Do wish they were available in double flaired.
Fantastic color and quality. Arrived really quick. Love them.
This is my second pair. I started with the clear. Love these.
I got a 8g and it was smaller than expected and slipped out. They don’t do exchanges so be careful.
One of the items from my order was incorrect but the seller corrected the issue and sent me the right size I ordered. Love these because metal irritates my skin. Super easy to clean! Thank you! Would order from again!
Great craftsmanship I really love them
I frequently buy from this shop and am always happy with the quality and customer service!
They're very comfortable and love the flash of dark blue when I move my head.
Very pretty! fits well, love the blue color
Great as always, I have about 13 pairs from this shop.
Really nice quality! Very comfortable to wear too!
Nice quality, exactly what I expected.
Shipped in only a few days. They’re beautiful.
These two tunnels had different inner widths, also the one that had the smaller inner width was too small for my ear. Love this shop but this made me sad. UPDATE: Nice seller of the shop corrected this issue for me!!!!
I love their jewelry. Very reasonable prices and made well. Arrives quickly. Thank you so much!
Never disappointed! I have so many pairs from this shop.
Fast shipping, good packaging! Will be back for more!!

I have the amber, clear, black, and smoke double flares and one single flare in green. I'll buy the double flare of the green when it restocks. These are the only tunnels I wear anymore.
This seller is always amazing to work with and you'll love anything you buy from this shop.
Thank you so much for the gauges! Super fast shipping and amaze service! Seller quickly answered my questions about gauge sizing before I purchased to be sure I was getting the right size. Seller included a FREE pair of gauges with purchase, which was beyond kind. Will buy again through this hella unique shop.
Love the smaller flare in front. Quick shipping
Good quality glass tunnels, and true to size. The shipping was fast!
Super fast shipping, comfortable to wear.
These are exactly what I was looking for! Thank you
I love it! It’s hard to find 9mm tunnels, so I’m happy that not only did I find some, but they also look so pretty.
This Pyrex material is so nice. Don’t have any allergic reactions like I do with regular plastic retainers.
Ear holes filled 10/10 would ear hole again.
First time buyer, now long time customer. Shipping was quick, no issues, and arrived a bit earlier than expected! Yay! Quality: 100% ALL THAT! Packaging: ON POINT! I bought this pair for my 4g conch, and 4g septum, both freshly stretched. The tunnels are so lightweight I sometimes frantically check to see if they’re still there. And they are, lol. They’re incrediblyyy comfortable, can’t stress that enough, and have made my healing process smoother. Tiny side note: the O-rings were a teeny loose once my swelling subsided but this was not a deal breaker. Very happy with this purchase. I will absolutely be returning. Thank you! <3
Sand is way too light, glass material is great but sand color is not as dark as the picture portrays... Sucks because it wasn't used and won't be used and I can't return or exchange the item.
Love everything about them and the girl who runs this place is amazing with customer care!
Product was as expected! Quick delivery.
Exactly what I was looking for. Lightweight but sturdy. Very comfortable fit.
Very pretty! Favorite pair of tunnels!
Just as described! I've ordered from this shop multiple times!
Absolutely in love with these 🖤
Absolutely in love with these 🖤
Awesome item as usual! The color is subtle, great quality, as expected.
Great products, never let down