Features Positive and Negative Output: This boost-buck converter supports positive & negative dual output voltage. High Conversion Efficiency: High conversion efficiency up to 90%, the floor flange has stable output voltage. High Quality: Made with high quality electronic components, the floor flange is stable performance. Reliable Performance: The floor flange is built in frequency compensation, soft-start function, thermal shutdown function and current limit function. Widely be Used: ADC, DAC, operational amplifier, audio equipment, LCD power supply and more. Specification: Material: Cast iron Size(Optional)Thread Diameter Bottom Plate Dia. Thickness Weight DN15, 1/2"20mm*65mm*4mm 960g/33.9oz DN20, 3/4"25mm*70mm*4mm 1100g/38.8oz DN25, 1"32mm*75mm*4mm 1285g/45.3oz Quantity: 10pcs Package list: 10 * Flanges Package List