HP 21XL Black Inkjet Print Cartridge. Operating relative humidity range: 5 - 95 %, Storage temperature range (T-T): -15 - 35 °C, Operating temperature range (T-T): 15 - 35 °C. Package weight: 73 g, Weight: 47 g, Package dimensions (WxDxH): 113 x 36 x 115 mm