Easy installation : simply install to your faucet with an adaptor (water separator), can 360 degree rotation after installed - Can adjust the pressure of water - Provide not only single jet, also triple jet - The angle of the water jet is 90 degree, can help clean teeth better - Unique right-angled jets can clean neck of the inner most tooth Specification : Material ABS Model MK1047 Color White Faucet matching type Outer M24*1 fine teeth (outer diameter 23.2-23.8mm) Internal M21*1 fine teeth (inner diameter 20.2-20.8mm) 4 points inner teeth (inner diameter 19.2-19.8mm) Size 17 x 3 x 7cm/6.69 x 1.18 x 2.75 Package Included : 3 x Multi-jet nozzle 3 x Single-jet nozzle 1 x Astic faucet adapter 2 x Faucet adapter 1 x Storage box 1 x Handle set 1 x User manual