Jardin 2-Piece Air Valve Connector Inline Tubing for Aquarium, 4mm by 8mm, White Product Name : Straight Connector; Overall Size (Approx.) : 40 x 10mm/1.6" x 0.39" (Maximum D x L) External Diameter : 8mm/0.31", 4mm/0.15"; Material : Plastic Color : White Net Weight : 3g Package Content : 2 x Straight Connectors