Kailh Box Hush Pro Deep Sea Whale 40g

Quick Summary

The Kailh Box Hush Pro Deep Sea Whale, also sold as the Deep Sea Pro Silent Whale, is a light silent tactile: a 40g BOX switch with a gentle bump, a dampened PA12 stem, and factory lube. It pairs subtle feedback with near-silent operation, making it ideal for quiet rooms where you still want to feel a key register. As an affordable silent tactile, it is an easy recommendation.

Specs and Feel

Travel is 2.0mm pre-travel and 3.6mm total, with a very light 40g actuation. The rounded BOX-style PA12 nylon stem carries the dampening pads that muffle both ends of the stroke, the same physical trick that makes the linear Deep Sea Island so quiet. The polycarbonate top and nylon bottom housing keep it stable, and factory lube smooths the travel. The tactile bump is intentionally soft; combined with the light spring and dampening, this is a gentle, low-effort tactile rather than a punchy one. The silencing rounds the bottom-out slightly, as always.

Tuning

It is good stock — factory-lubed, dampened, and consistent. If you want to fine-tune, keep lube off the tactile leg and the dampening pads; only a whisper on the rails is safe, since over-lubing softens both the bump and the bottom-out. Films are unnecessary thanks to the BOX tolerances. For most people, this is a switch to drop in and forget about.

Verdict

Buy the Deep Sea Whale if you want a quiet, light, factory-ready tactile for an office or late-night use. It is the tactile sibling of the silent-linear Deep Sea Island, and far quieter than a standard Box Brown V2. Skip it if you want a strong, defined tactile bump. The dampening and light weight make this a gentle switch by design.