The G10899-01K from Hamamatsu Photonics is a Photodiode with Wavelength Range 0.5 to 1.7 µm, Capacitance 70 to 130 pF, Dark Current 1 to 5 nA, Responsivity/Photosensitivity 0.15 to 1 A/W, Active Area Diameter 1 mm. More details for G10899-01K can be seen below.