The back section, seat section, hydraulic cylinder, and table base are made of ABS synthetic resin, which protects them from knocking, scratching, rusting, and washing damages. The back section can be operated manually from horizontal to 45° up by gas spring cylinder, and equipped with a paper roll holder. The tabletop is 125cm-long and 55cm -wide. The height can be adjusted from 65cm to 95cm, by a square cylinder powered by electric motor pump and waterproofing foot switch.