Thorlabs offers all the individual parts needed to assemble a custom fiber collimator. We manufacture a variety of pigtailed ferrules with antireflection coatings; graded-index (GRIN) lenses for refocusing the output beam of a fiber; and glass sleeves to assist with alignment. Our single mode (SM) and polarization-maintaining (PM) pigtailed ferrules are optionally available with FC/PC or FC/APC connectors. The ferrules and GRIN lenses are available in 8° or 0° versions, which minimize back reflections or simplify alignment, respectively. For microscopy applications, we also offer GRIN lenses designed for imaging.