"Ekulit offers plastic speakers in sizes from 10 mm to 90 mm.
These are available in a wide range of designs.
With or without mounting lugs, impedances from 4 - 300 ohms, Mylar diaphragmImpedance: 8±15% ohmsPower (nominal): 0.1 WPower (maximum): 0.2 WResonant frequency: 220±20% HzSound pressure level: 117±3 dBFrequency range: 170 - 18,000 HzOperating temperature: -25 - +50°CStorage temperature: -25 - +60°C"