ITEM NO.: JK0085‧It is made with aluminium and brass, never rust. ‧Can working under very low water pressure: 15 PSI.‧Two heights in one can be selected: fixed height or pop-up automatic. * Automatic up and down when water is on and stop.‧Roller type moving base what is harmless to your lawn, which is environmentally friendly.‧Watering cover area: Fixed height: Dia 12 M under water pressure 50 PSI. Raised position: Dia 14 M under water pressure 50 PSI.