VCC's LPCR Series of light pipes are 0.171" (4.34mm) diameter and are made of optical grade polycarbonate for maximum light transmission. They use crushable ribs allowing a press fit for front panel mounting providing a low profile flush panel design. They are available in 8 lengths from 0.125" (3.2mm) to 1.000" (25.4mm) and have a 160° viewing angle.