Review on 🐠 Y-Axis 50 Pcs Aquarium Air Valve Connector: Acrylic Inline Tubing Non-Return Valves for 3/16'' - Enhance Your Aquarium's Aeration Effortlessly! by Kim Gilbert

Good selection of air fittings but I found the thick strong plastic of these fittings to be very difficult to fit over the air hose. Compared to my previous purchase from another manufacturer that used softer plastic (bottom fitting pictured), these clear new fittings won't fly fully in an airline without a lot of pressure that I've still not been able to fully adjust. far further. I will be returning them and going back to another manufacturer that uses softer plastic and thinner edges to accommodate the air line tube.