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Check Valve Details: - Material: Acrylic - Color: Black Check Valve Feature: 1. Made up of acrylic, non-toxic and durable, can not be harmful to your fish. 2. One way non-return check valve can prevent aquarium water backflow. When air pump power failure or air pump placement is below aquarium water, aquarium water will be backflow to damage the air pump. 3. Apply to: aquarium, fish tank and air pump and also other aquarium products. 4. Size:53mm/2.10"(long),15mm/0.60"(width), fits for air-line inner diameter for 4mm/16". 5. Use the check valve, prevent water into air pump, is a perfect match of the air pump. Check Valve Attention: 1. An air pump outlet is connected with a check valve if two outlets need to be connected with two valves and so on. 2. Soft tube head with warm water turning soft, connect with check valve. 3. Prevent power failure, prohibit aquarium water backflow to damage the aquarium equipment. Check Valve Package Included: 16x Check Valves

Četudi je tvoj motor star, uporabljen in je prevozil na stotine tisoč kilometrov, lahko ponovno služi kot dobro vzdrževani motor star 2 leti.* Vse s pomočjo nove formule, ki žlahtniti kovino in čisti sistem za gorivo.* Ko je vstavljen v rezervoar, takoj izboljša kakovost goriva in zmanjša njegovo porabo, ohranja filter in podaljša življenjsko dobo motorja.* To je šele začetek!