Description Do you want a kind of professional seal cup for your pitcher pump? Do you want to keep your pitcher pump function normally? This can be your best choice. Really practical and useful, just install it in your pump. Features - Color: Black. - Material: Rubber. - Size: 10.30X10.30X2.20cm/4.05X4.05X0.86in Top: 10.3cm; Bottom: 9.3cm Suitable pump: 100mm - The valves of the water pump will open upward due to the water pressure when the piston of the water pump runs downward, allowing water to flow into the cavity of the water pump. - The piston of the water well pump moves upward when the handle is pressed, and the valves will close automatically to lift the water out of the cavity. - Provide better sealing effect for pitcher pump, allows it to function normally. - Construct with premium and high-class rubber material, this universal cup leather will give you a good using experience. - Great craftsmanship, delicate shape, good texture, beautiful look, fashionable and unique. The valves of the water pump will open upward due to the water pressure when the piston of the water pump runs downward, allowing water to flow into the cavity of the water pump. The piston of the water well pump moves upward when the handle is pressed, and the valves will close automatically to lift the water out of the cavity. Provide better sealing effect for pitcher pump, allows it to function normally. Construct with premium and high-class rubber material, this universal cup leather will give you a good using experience. Great craftsmanship, delicate shape, good texture, beautiful look, fashionable and unique.