This is a replacement part to address the aperture control failure, commonly known as "black death," that frequently occurs in Pentax K-30 and later entry-level cameras. This set allows for the replacement of both the solenoid and the U-shaped bracket. Cameras affected by "black death" use a yellowish-green plastic part. This replacement part has a white plastic component. #k-30 #k-50 #k-s1 #k-s2 #k-70 Series...K