Pigtail style variable attenuator at 1300/1550nm with 1m long, 0.25mm OD coated, 9/125µ single mode fiber with unterminated end at input side, 1m long, 0.9mm hytrel jacketed 9/125µ single mode fiber terminated with an angle FC/APC connector at output end, 60dB return loss and in rectangular housing. LL(low loss)<=0.6dB (excluding connector losses)