The W-HPL230 from Ross Optical Industries is a Waveplate with Wavelength Range 266, 355, 532, 632.8, 780, 808, 850, 980, 1064, 1310, 1480, 1550 nm, Waveplate Thickness Approximately 0.5 mm, Waveplate Diameter(Inch) 1.2 Inch, Waveplate Diameter(mm) 30 mm. More details for W-HPL230 can be seen below.