From the product description, check product page for current description, price and availability:

This Duotight Bulkhead is the same one used for installing the Temp Twister cooling coil into the lid of the FermZilla. Allows you to add a bulkhead to just about anything that can then be connected to with EVABarrier 9.5 mm OD Tubing (D1719) or 3/8″ OD stainless or copper tubing.

Duotight fittings are high-quality push-in fittings that seal tight and offer superior sealing capacity due to the double O-ring sealing design.

High Performance Double O-Ring Design:
The secret to Duotight’s superior sealing performance comes from the fact that they use not one, but two high-quality EPDM O-rings. The double O-ring means they have literally twice the sealing surface when compared with other push-in fittings. This makes them more reliable and significantly reduces the chance of leakage.

The double O-ring system also means that tubing can be bent at a much tighter radius without causing leaking issues, which can be an issue with other fittings. This combination of factors makes Duotight the most reliable push-in fittings on the market.

EPDM offers excellent chemical resistance for a longer life span. When compared with silicone and vinyl, EPDM has much better gas transmission rates, better wear resistance, and is BPA-free.

No Clamps Necessary!
We recommend cutting your tubing straight, not on an angle, to ensure the line forms a complete seal. To remove the fitting simply push in the collet and the hose can be removed.

Features:
Insert tubing and firmly push to connect
Easily release tubing by pushing in the collet
Suitable for both gas & beverage applications
Made from food-grade acetal plastic
Double O-rings made from highly chemical resistant EPDM
Locking teeth made from stainless steel
Pressure rated to 150 psi
Temperature rated to 212°F (100°C)

Please note: exposure to chlorine will degrade the acetal plastic and stainless steel these fittings are made from. Do not use in contact with bleach or other chlorinated cleaning chemicals.

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