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Specifications: Material: PVC + Copper + Rubber Color: Black + Transparent Color Total Length: 2.1m/82.7" Diameter: 15mm/0.59" Package Weight: approx. 240g How to Use: Make one end head of the tube into the needed to extract liquid, firstly, pinch flat rubber ball forcedly to vent the air, then blocked the export of the pipe with fingers, and release the rubber ball, wait until the spheres bulging recovery slowly, and when the liquid was pumping up to fill fully the rubber ball, you can release the fingers, and repeat one or two times of this operations, it will form a continuous gravity. Package Included: 1 x Hand Pump