Product Details Manually control the flow of vital O2 or switch an air pump "on or off" The small black cap on the control valve can be removed and other small holes can be covered according to your needs. Individually control the air flow of each outlet port for your multiple needs. Great for running 2 filters or air stones at the same time. Aquarium Suction Cups Aquarium Control Valves Aquarium Tubing Connector Aquarium Airline Tubing Aquarium Check Valves Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Customer Reviews 4.3 out of 5 stars 1,135 4.6 out of 5 stars 456 4.6 out of 5 stars 608 4.6 out of 5 stars 2,953 4.4 out of 5 stars 750 Price $5.09$5.09 $5.79$5.79 $5.29$5.29 $5.48$5.48 $4.98$4.98 Count 24 pcs 20 pcs 40 pcs 25 feet 10 pcs Color clear grey clear clear red