Serin RBA Bridge – Boro Rebuildable by Early Bird

The Serin RBA is Early Bird’s first rebuildable bridge for Boro tanks. It gives users full control over coils, airflow, and flavor. The design targets both beginners and experienced builders who want flexibility without complexity.

Because of its compact bridge format, the Serin RBA fits easily into most Boro AIO setups.

Flexible Airflow from MTL to DTL

The Serin RBA includes five interchangeable air pins. Sizes range from 1.5mm to 3.5mm. Start tight for MTL or open it up for restricted DTL.

You can swap pins in seconds. This airflow range suits different coils, liquids, and personal preferences. An optional Serin MTL Kit allows an even tighter draw.

Simple Single-Coil Build Deck

The single-coil deck keeps building straightforward. Coil installation feels open and uncluttered. Wicking stays simple thanks to the anti-leak channel design.

You can wick slightly looser without worrying about seepage into your tank.

Top-Airflow for Clean Flavor

Air enters from the top and travels down to the coil. This layout reduces leaks and keeps the chamber drier than bottom-airflow designs.

As a result, flavor remains concentrated and consistent with every draw.

Broad Boro Compatibility

The Serin RBA fits most Boro tanks and AIO mods that accept bridges. It also works with premade Boro coils if you prefer convenience over wrapping your own builds.

This compatibility makes the Serin a strong upgrade for stock-coil users.

Key Features

• Rebuildable Boro RBA bridge

• Designed for most Boro tanks & AIO mods

• Single-coil build deck

• Top-airflow system for leak resistance

• 5 airflow pins: 1.5 / 2.0 / 2.5 / 3.0 / 3.5mm

• Supports MTL to DTL vaping styles

• Easy wicking with anti-leak technology

• Compatible with premade Boro coils

• Integrated drip tip included

• 510 drip tip adapter included

• Finishes: Matte Black / Stainless Steel

Why Choose the Serin RBA?

The Serin RBA delivers strong flavor, precise airflow control, and simple building. Five air pins cover tight MTL through open DTL. The top-airflow path keeps tanks cleaner and drier.

If you want better flavor and full customization in a Boro bridge, the Serin RBA stands out.

What’s in the Box

• 1 × Serin RBA

• 1 × Integrated drip tip

• 1 × 510 drip tip adapter

• 5 × Air pins (1.5 / 2.0 / 2.5 / 3.0 / 3.5mm)

• 1 × Spares bag

MTL KIT (YOU WILL NEED THE RBA)

Serin RBA MTL Kit – True MTL Conversion by Early Bird

The Serin RBA MTL Kit converts your Serin RBA into a dedicated Mouth-to-Lung setup. This accessory pack adds tighter airflow, focused chamber reduction, and improved wicking control for a true cigarette-style draw.

It targets nic salts, higher-resistance coils, and flavor-focused builds.

Precision MTL Airflow Control

The kit includes three MTL air pins: 0.8mm, 1.0mm, and 1.2mm. These sizes create a noticeably tighter draw than the standard Serin pins, which start at 1.5mm.

Swap pins quickly to match coil resistance, e-liquid strength, or personal preference.

Focused Chamber & Wicking System

An MTL airflow chamber insert compresses vapor space for stronger flavor concentration. The MTL wicking sleeve improves juice control on tighter builds and reduces oversaturation.

Together, these parts create a smooth, restricted inhale with clean flavor delivery.

Integrated Drip Tip for MTL Comfort

The included MTL integrated drip tip narrows the vapor path and improves lip feel. This design enhances draw restriction while keeping the setup compact and balanced.

Key Features

• Converts the Serin RBA to a dedicated MTL setup

• MTL wicking sleeve for tighter builds

• MTL airflow chamber insert for flavor concentration

• MTL integrated drip tip included

• 3 × MTL air pins: 0.8mm / 1.0mm / 1.2mm

• Tighter draw options for precise control

• Ideal for high-resistance coils

• Optimized for nic salts

• Designed by Early Bird

Why Choose the Serin RBA MTL Kit?

The standard Serin RBA spans MTL to DTL. This kit pushes airflow tighter for a true restricted draw. The chamber insert and wicking sleeve work together to intensify flavor on small coils.

If you already own the Serin RBA and want full MTL performance, this kit completes the conversion.

What’s in the Box

• 1 × MTL wicking sleeve

• 1 × MTL integrated drip tip

• 1 × MTL airflow chamber insert

• 3 × MTL air pins (0.8mm / 1.0mm / 1.2mm)