HP 28 Tri-colour Inkjet Print Cartridge. Operating relative humidity range: 5 - 95 %, Storage temperature range (T-T): 0 - 40 °C, Operating temperature range (T-T): -15 - 35 °C. Dimensions (WxDxH): 140 x 112 x 35 mm, Package weight: 70 g, Weight: 45 g