King 4000 S45, home budget line, softer, high polish for a 4K, ~21$ on Amazon. King 4000 F3 (deluxe line); slightly larger, ~29$. The "Deluxe" or "KDS" Kings are reputed to be harder, faster, and bigger than the economy home Kings.

25$ https://www.amazon.com/gp/product/B000OZ6XMU Suehiro 1000/3000 grit Skg-24 (Japan Import)

King 4000 S45 S-45P and F-3 prices. https://www.amazon.com/s?k=king+4000+stone+F-3

Mirror polish from King 4000 S45P S-45. https://www.reddit.com/r/sharpening/comments/110rnhb/breaking_in_a_new_king_4000grit_stone/

Sharpening demo of King Deluxe 1000 and King F-3 4000. https://youtu.be/oeDPP4jSH_M?t=157 King Whetstones 1k and 4k [F3 F-3 4000] session. Lofoten Knifeworks : King deluxe 1000 - 02:09. 2:38 king king stones are always a treat to work on i love the feedback they give...