Bring your 40% build to life with the Poseidon PSD40 case, crafted for keyboard enthusiasts who want precision and personality. Designed to fit JJ40, BM40, and BM40 RGB layouts, this compact case blends sleek curves with vibrant color options—Yellow, Purple, Cyan, and White.
- Manufactured with premium CNC machining and electrophoresis coating
- Dimensions: 24 × 8.7 × 2 cm (front); 3 cm (back)
- Supports RGB builds with customizable underglow
- Durable, high-end finish for long-term use
Whether you’re shopping to buy CNC mechanical keyboard case or browsing the best custom keyboard case for BM40, Poseidon delivers exceptional craftsmanship and reliability.
Want to know how to maintain a mechanical keyboard case? Just wipe with a microfiber cloth and avoid harsh solvents.
Jonathan Ray (verified owner) –
This case transformed my BM40 build! The CNC finish feels premium and the RGB shines beautifully.
Randall Watson (verified owner) –
Impressed with the quality—definitely one of the best custom keyboard cases for BM40 I’ve come across.
Robert Lane (verified owner) –
Was looking for a cheap mechanical keyboard case for JJ40 and ended up with this. Worth every penny!