Review on Premium Refrigerant Charging Hose with Ball Valves - High-Quality HVAC Hoses 1/4'' SAE R410A 800 PSI - Ideal for R134A R12 R22 R502 R404 Coolant Adding and Air Condition Maintenance - 3-Color 3 Pcs Set by Paul Lee

Hoses rigid and rigid. The o-rings are also solid, so you'll need to tighten them with pliers to close them. However, this is normal with new hoses! After about the 10th time I've used them to connect to the mount, everything has loosened up and I no longer need pliers to secure the mount. So far I've connected probably 50 different devices and the lines are working as expected for charging and evacuation.