You can get 10% discount if you buy 8pc, 5% discount if buy 4pc. They are same as store product code OSC-PUMP-980-034D, but classified by kink-free power test data. 250um-coating bare fiber pigtail without connector. See manufacture test data at the last three pdf links bellow. See datasheet at 1st two pdf links below (1st one is from Oclaro website, 2nd one from manufacturer email). The LC96P series pump module utilises a Fiber Bragg Grating design for enhanced wavelength and power stability performance. This product has been designed to ensure superior wavelength locking over drive current, temperature and optical feedback changes.The 2nd page of 1st attached pdf specification shows: "Operating power assumes a 10% ageing margin: operating power = kink free power / 1.1 ". For this Oclaro model: LC96A74P-20R, kink-free output power of actual test data is normally much larger than 400mW (see three samples in last 3 pdf links below), so customers can use them at much higher than 365mW in their actual system products. For example, manufacturer confirms that "If the LC96A74P-20R sample meets a minimum kink free power of 500mW, at a drive current of 950mA or less, then they can be operated at 455mW over life. There are no additional ageing considerations to take in to account due to the pump being used at a higher power." This thumb of rule is quite accepted by EDFA makers, especially for Oclaro LC96 pump lasers. Kink-free power test data of all our samples are at 997mA, so max operating power can be chosen around 950mA(also about 10% margin for current).