Custom PBT Side Printed Keycaps 135-Key Set - Durable Side-Lit Upgrade

In this review of the Custom PBT Side Printed Keycaps, the bottom line is simple: these keycaps are for mechanical keyboard owners who want a durable, side-lit styling upgrade without replacing their switches. The set's single biggest selling point is the distinctive side-printed legends that allow backlight to shine through while using oil-resistant PBT material and dye sublimation printing for long-lasting legends. The inclusion of 135 keys and a 6.25u spacebar makes this a practical kit for most common layouts, and the set arrives with a keycap puller so the swap is straightforward.

Key Features

• Side-printed legends: The special side-printed design lets keyboard backlighting pass through the fonts for visible, low-profile illumination without sacrificing a clean top surface.
• Oil-resistant PBT material: Keycaps are made from high-quality PBT with an oil-resistant coating that reduces fingerprints and shine for a longer-lived look.
• Dye sublimation printing: Legends are produced with dye sublimation so characters remain sharp and resistant to fading over extended use.
• Universal 135-key kit: The set includes 135 keys, a 6.25u spacebar and a keycap puller, fitting most 60% through 100% US-layout mechanical keyboards.
• Side-lit compatibility note: Designed for side-lit effects, these caps are most effective when LEDs face the recommended direction for optimal illumination.

Who It's For

Keyboard enthusiasts who want a modern, understated look with functional lighting will appreciate this set; it suits hobbyists who change keycaps regularly and value durable PBT and long-lasting legends. The kit covers most popular layouts including 60%, 65%, 75%, TKL and full-size boards, making it a convenient all-in-one replacement for many builds.

Those seeking fully translucent keycaps, custom sculpted artisan caps, or non-US layouts should look elsewhere, since this set is side-printed rather than fully backlit and is specified for US layout compatibility only. Buyers who need specialized sizes beyond the provided 6.25u spacebar should confirm fit before purchasing.

Pros & Cons

Pros

• Durable PBT construction and oil-resistant coating keep the surface from glossy wear and fingerprint buildup.
• Side-printed legends allow pleasing side-lit illumination while preserving a clean top profile.
• Comprehensive 135-key kit and included keycap puller make installation simple and compatible with many layouts.
• Dye sublimation printing prevents legend fading for long-term use.

Cons

• LED illumination effectiveness depends on keyboard LED orientation; best results require LEDs facing the recommended direction.
• Not intended for non-US or highly customized layouts, which may require extra key sizes.

Specifications

Brand	Tsungup
Keycap material	Oil-resistant PBT
Printing method	Dye sublimation, side-printed legends
Key count	135 keys with 6.25u spacebar
Compatible layouts	60%/65%/75%/80%/96%/100% US layouts
Included accessories	Keycap puller

Our Verdict

The Custom PBT Side Printed Keycaps are a solid value for users who want a durable, low-maintenance upgrade that supports side-lit backlighting and fits most standard US mechanical keyboards. With PBT material and dye sublimation legends they deliver longevity and a subtle illuminated look, making them a sensible choice for everyday use and hobby builds.

Frequently Asked Questions

Will these fit my mechanical keyboard?
They fit most common US-layout mechanical keyboards including 60% through 100% sizes, but verify any nonstandard spacebar or bottom-row sizes before buying.

Are the key legends prone to fading?
No, legends use dye sublimation printing which resists fading under normal use.

Do LEDs show through well?
Yes for side-lit effects, but note LEDs perform best when oriented as recommended so light can shine through the side-printed fonts.