Ankong&reg;Standard Upright Fire Sprinkler Head 1/2NPT 68 Centigrade (The Spray) Package Content: 5pcs x Fire Sprinkler Head; Size: 53 x 34mm/ 2.1" x 1.3"(H*D); Net Weight: 190g Color: Red, Silver Tone; Material: Metal, Glass Product Name: Fire Sprinkler Head; Flow: 80+/-4 Glass Ball Diameter: 5mm; Temperature: 68 Celsius Degree Thread Diameter: 21mm/ 1/2NPT; Standard: DN15