HP 791 Ink System Cleaning Kit. Operating relative humidity range: 30 - 70 %, Operating temperature range (T-T): 15 - 30 °C, Storage relative humidity range: 10 - 80 %. Weight: 0.951 kg, Package weight: 1.119 kg. Dimensions (WxDxH): 390 x 145 x 47 mm, Package dimensions (WxDxH): 390 x 145 x 47 mm, Pallet size (EU): 1219 x 1016 x 1523 mm