This irrigation pump core is crafted from engineering plastic, ensuring durability and precision. Its transparent design allows users to monitor performance easily, while pump mechanism delivers consistent high-pressure water flow. Ideal for maintaining oral clean and enhancing care routines. Features -Color:Transparent -Material:Engineering plastics -Size:15.70X2.90X2.90cm/6.17X1.14X1.14in -Water inlet outer diameter: 4 mm -Highpressure cleaning: designed with dc highpressure technology, this pump effectively removes stubborn debris between teeth, enhancing oral cleanliness -Transparent pump structure: the plastic material allows users to monitor water flow and cleaning status, ensuring optimal performance during every use -Durable piston pump: featuring advanced piston pump technology, this accessory offers stable operation and durability for daily care -Compact and portable: its lightweight and compact design makes it easy to carry, providing professionalgrade cleaning at home or while traveling -Brushless pump core efficiency: equipped with a special dc brushless pump core, this pump ensures extended lifespan and reliable performance for water flossers Package list: 2 x tooth washing pump cores