4Lasers provide unique zero-order, monolithic design mid-infrared (MWIR and LWIR) waveplates mounted in ⌀25,4x6 mm black anodized metal mount for use in the range of 2800 nm - 10600 nm. These waveplates are available with quarter-wave, half-wave or any other custom retardance. Each MWIR and LWIR waveplates designed for particular wavelength in the range from 3500 nm to 9500 nm are antireflective coated, while each 2800 nm - 3000 nm, 10000 nm - 10600 nm waveplates are uncoated.