Genuine 30 Ω Pentax solenoid, not an aftermarket substitute. This is the original specification component used in Pentax cameras affected by solenoid related issues, providing reliable operation and long term durability. It is the earlier Japanese made version known for its stable performance and not prone to the aperture block failure commonly seen in later green China made units.
This product would be best fit for those looking for an authentic replacement part for their Pentax K-30, K-50, K-70, or KS1 or KS2 cameras.