Standard 3/8" Mylar tweeter element with phase lens.Perfect for small compact speaker projects.Rear mounting may be required due to terminal locations.Limited quantities. Specifications: *Power Handling: 20 watts RMS/40 watts max *VC dia: 3/8" *Znom: 6 ohms Re: 4.10 ohms *Frequency range: 6,000-20,000 Hz *Fs: 4,200 Hz *SPL: 87 dB 2.83V/1m *Driver Dimensions: Overall Diameter: 1-3/8", Cutout Diameter: 1-1/4", Mounting Depth: 5/8".