Specifications: Compatible fluid: water; Normal use pressure: less than 0.4 MPa; Maximum operating pressure: 1.0 MPa; Fluid temperature: 32°F - 122°F (0°C - 50°C) (unfreezed); Environment temperature: 32°F - 122°F (0°C - 50°C); Composition: Material: Main body brass + plating, generator SUS, O-ring NBR Dimensions: 2.0.0.0.1 inches (51 mm) x 1 inches (26 mm) x 136 oz (136 g). 10.2 oz (290 g). Size: 2.0 x 1.0 inches (51 x 26 mm); Cosmetic box size: L 6.3 x W 3.9 x H 2.0 inches (160 x 100 x 50 mm); Mounting diameter: G1/2 (female screw out male screw); Water flow instructions in female thread: G1/2 Out: G1/2. No expensive pump tank needed. No danger of pulling power into your bathroom. Easy to install by anyone. It will soften the hot water. The frustration of water pressure reduction has also been kept to a minimum. It is also directly connected to the shower hose, so you can use your current shower head as it is. If your current shower faucet is [INAX, SAN-EI, KAKUDAI, MYM, YUKO], it can be installed directly without an adapter. If your current shower is [TOTO, KVK and (Balance Cooker) Made by Tokyo Gas, Rinnai, please use a separate adapter to attach to the shower hose. If you need an adapter that is included between BRISE and the faucet, you must need a separate adapter between the BRISE and the shower hose. This is not available in our company, so please purchase a suitable adapter at a hardware store. If the connection diameter is G1/2, it can be directly installed without an adapter. Recommended Water Pressure: Water discharge with the shower head facing up and the water will blow over 1.5 meters high.