p Installation is quick and easy, both vertical and horizontal p extremely high adjustment accuracy p and stable operation Suitable for medium: air, non- gas. Range: 50～500Pa Accuracy : Repeatability Less than +/- 1% times full scale; Service life : 106 switching cycles colour:Gray Material:plastic size:81*53mm Package Contents: 3*Micro- differential pressure switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.