Lens Hood 49mm Flower Screw-In For HD PENTAX-D FA MACRO 100mm F2.8ED AW Lens
Normally this lens hood is screwed on top of the lens with the filter size 49mm. You have a two lens with a filter size 46mm and a 49mm lens. You will need a step-up ring 46mm-49mm and you can use a lens hood for two lenses.