The 4mm Airline Holder (Suction Cup) is an essential accessory for maintaining neat and secure airline tubing in aquariums. Designed to accommodate 4mm diameter tubing, this holder utilises a strong suction cup to attach firmly to glass or tiled surfaces, ensuring the airline remains in place without slipping. Ideal for use with air pumps, filters, and other aeration equipment. The compact design minimises visibility, contributing to a tidy and organised aquarium setup.