ID: 13mm (1/2in)
Generation 6 no-spill quick disconnect couplings which push to connect with a negligible amount of coolant freed. The QDT4 series includes couplings for 13mm (1/2 inch) ID tubing.
EPDM Seals (Water/Glycol)
Quick disconnects with o-rings made of EPDM, generally used with water and glycol-based liquids. (Recommended for Koolance coolant.)
Viton Seals (Oil)
Quick disconnects with o-rings made of Viton, generally used with oil-based liquids. (Not recommended for use with Koolance coolant.)
Stay Connected