Product Details:

Robust high-quality black nickel plated barbed fitting with cylindrical thread (G1/4). The fitting is suitable for PVC, PU, PA, silicone and PE hoses with an inner diameter of 11-13mm. With integrated 1/4 Perbunan(r) O-Ring seal.
We recommend the use of hose clamps or zip ties for best possible safety!

Note for watercooling beginners:
The connectors for hoses(7/16, 3/8,1/2) are provided with measurements in mm in our shop. These can differ by +-1mm, which is no problem as hose clamps have to be used for installation. If the hose is to be mounted without a clamp, a larger fitting should be chosen. With some fittings that tend to be larger, it is possible though that a hose with an inner diameter of 13mm actually does seal without a hose clamp.

Overview:
10mm (3/8) hose clamp: up to 8mm none, from 10mm up required
10mm (7/16) hose clamp: up to 8mm none, from 10mm up required
12mm (1/2) hose clamp: up to 11mm none, from 12mm up required
13mm (1/2) hose clamp: up to 11mm none, from 13mm up required