uxcell Plastic Straight Tube Joint Aquarium Fish Tank Connector Coupler 2PCS Product Name: Plastic Straight Tube Connector; Color: Clear Material: Plastic; Total Size: 23 x 50mm/ 0.9 x 2"(Max.D*L) Net Weight: 9g Package Content: 2 X Plastic Straight Tube Connector Hole Inner Dia: 9mm/ 0.35"; 12mm/ 0.47"