Specifications: The external connection is not leaking and not rusting, and with diving circuit protection, it has voltage safety. It can be a long time continuous work, low noise, safety and environmental protection. This pump is centrifugal pump, it cant vent the air automatically, so it must be operated by submersible installation. Item Name: Water Pump Material: Nylon, Fibreglass Specifications: 1#: DC 12V Stainless Steel Shaft Core with Silicone Bracket 2#: DC 24V Stainless Steel Shaft Core with Silicone Bracket 3#: DC 12V Ceramic Shaft Core with Silicone Bracket 4#: DC 24V Ceramic Shaft Core with Silicone Bracket Water Temperature of External Water Pipe: Up to 80 Celsius Degree Diving Water Temperature: Up to 60 Celsius Degree Flow Characteristics: 1-in and 1-out Outer Diameter of Water Inlet: 16mm/0.63" (Approx.) Outer Diameter of Water Outlet: 12mm/0.47" (Approx.) Rated Voltage: 12V/24V Power: 19W/24W Maximum Flow: 800L/H Lift of Pump: 5M Working Sound: 40dB Impeller Type: Semi-open Pump Principle: Centrifugal Pump Motor Type: Brushless DC Motor Waterproof Rating: IP68 Life: 20000 Hours Working Method: Continuous Use Fluid: Drinking Water, Well Water, Light Brine, Antifreeze Power Supply Mode: DC Power Supply, Battery, Solar Panel (Battery Not Included) Purpose: Pressurized Circulating Hot Water Pump/Cold Water Pump Features: Durable, Easy to Use, Centrifugal, Long Service Life Pump Size: 80mm x 77mm x 49mm/3.15" x 3.03" x 1.93" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. The standard configuration prohibits idling and has no self-priming function. Package Includes: 1 x Water Pump (Battery Not Included)