Aquarium Airline Tubing Connectors I T L Y 40pcs Fish Tank Air Tube Adapters for

Aquarium tubing connectors 40 in 1 set: 10 x Y / 10 x T / 10 x L / 10 x I. Outer diameter ca. 5mm/ 0.2", inner ca. 2mm/ 0.08", fit for standard 3/16''(4/ 6mm) air lines, not for tube that is 2mm x 4mm (inner x outer). Its a little larger. You can put the end of the tubing in hot water for a little bit and it will make the tubing go on better. Made of HARD PLASTIC for long-time use, non-toxic and very rigid. Great accessories for your fish tank tube, air pump, check valve, bubble stone connection.