1 x 530nm - 1200nm IPL Colour Glass Filter. This is a replacement filter for use with IPL cosmetic and medical treatment machines. This filter is for the Energist type of IPL Machines. The filters are usually located inside the applicator itself. Long Pass Colour glass filters work by attenuating the shorter wavelength, whilst transmitting the longer IR wavelengths. The blocking of the UV light is by absorption and not reflection.. Material: 530nm Colour Glass. Length: 55mm. Width: 20.75mm. Thickness: 2.5mm. T=50% @ 530nm +/- 10nm. Prices do not include local taxes or import duty.