• 3mL vial adapters in multiple colors converting 10ml case slots to 3ml slots — 24mm outer diameter, 17mm inner diameter
  • 3mL vial adapters in 7 colors — gray, navy, black, olive, lime green, silver, and red — each holding a 3mL glass vial, showing color options for vial case slot conversion
  • Open black vial storage case with 3mL vial adapters installed in 24mm slots alongside loose adapters in olive, lime green, gray, and navy, holding assorted 3mL glass vials
  • 3mL vial slot adapter specification diagram showing 24mm outside diameter, 17mm inside diameter, and 25.5mm height with measurement callouts
  • Top-down view of open black vial storage case fully loaded with 3mL vial adapters in red, navy, olive, silver, gray, and lime green filling all 12 slots
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Layered Vault Studio

3mL Vial Adapters for Vial Storage Cases | Fits 24mm Slots | TRT, Peptide & Injectable Organizer

3mL Vial Adapters for Vial Storage Cases | Fits 24mm Slots | TRT, Peptide & Injectable Organizer

$2.95 USD
$2.95 USD
Sale Sold out
Shipping calculated at checkout.
Color: Turquoise
Number of Slots

3mL Vial Adapters – Add Flexible 3mL Storage to Any 24mm Case Slot

Already have a multi-size vial case and need more 3mL slots than it came with? These drop-in adapters fit any open 24mm slot and convert it for smaller 3mL vials instantly — no new case needed. Order exactly as many as you need and configure your storage layout to match your exact protocol.

Whether you're adding slots, replacing lost adapters, color-coding a multi-compound setup, or configuring a second case you already own, these adapters give you complete flexibility over how your case is organized.

Who This Is For

These adapters are popular with anyone managing injectable protocols who wants more 3mL flexibility in their existing case, including:

  • TRT or HRT patients who added more 3mL compounds to their routine and need additional slots in their existing case
  • Compounded GLP-1 users who store semaglutide or tirzepatide in 3mL vials and want to maximize their case's 3mL capacity
  • Peptide users running multiple 3mL compounds simultaneously who need more dedicated slots than their case originally included
  • Anyone who wants to color-code a multi-compound setup by using different colored adapters for different medications
  • Users configuring a second Layered Vault Studio multi-size case they already own

Will My Vials Fit?

Before ordering, confirm your measurements match:

  • Adapter outer diameter: ~24mm — fits your case slot
  • Fits 3mL vials up to: ~17mm diameter

Vial dimensions vary by brand. Measure your vials before ordering to confirm fit. Not sure? Message us with your dimensions before ordering — we're happy to confirm compatibility.

Why Order Extra Adapters?

  • ✔️ Add more 3mL slots than your case originally included
  • ✔️ Color-code your setup with a different adapter color per compound
  • ✔️ Replace lost or damaged adapters
  • ✔️ Configure a second case you already own

Compatibility

Designed and tested with Layered Vault Studio multi-size vial storage cases — these adapters fit into a 24mm diameter slot and hold 3mL vials up to approximately 17mm in diameter.

They may also fit other brands' cases but fitment cannot be guaranteed. Before ordering from a third-party case, confirm:

  • Your case slot inner diameter: ~24mm
  • Your 3mL vial diameter: ~17mm or smaller

Color Options

Adapters are available in multiple colors — select your color at checkout. If your preferred color isn't available we'll reach out before shipping.

Important Notes

  • This listing is for adapters only — case, vials, syringes, and needles are not included
  • Photos are for reference only
  • This product is 3D printed. Minor surface texture or layer lines may be present but are cosmetic only and do not affect function

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