New arrival

GRAV Glass Fission Downstem 14mm

$19.95

Give your setup a clean upgrade with the GRAV Fission Downstem. Designed to slot into any 18 mm joint and accept your favourite 14 mm cone or banger, this stem boosts smoothness and pulls cooler, better-filtered hits.

Each downstem features precision-cut fission holes formed with a single tungsten rod while the glass is molten — meaning super-clean edges, less clogging, and consistent diffusion every session.

Size
Same-Day Shipping Order before 12pm (AEST)
What's Included
  • 1 x GRAV Fission Downstem 14mm - 85mm or 115mm
Features

🔌 14mm Bowl Compatibility
Receives any 14mm cone, bowl, or banger — easy upgrades, endless customisation.

🧱 Fits 18mm Female Joints
Slides securely into any standard 18mm beaker bong joint for perfect alignment and airflow.

🔥 Premium Borosilicate Glass
Heat-resistant, durable, and crystal-clear — built to handle daily use without warping or cracking.

🧼 Reduced Clogging Design
Tungsten-shaped fission holes create rounded edges that resist blockages and keep your draw consistent.

📏 Two Size Options
Choose the 85mm or 115mm length to match your beaker’s ideal waterline and pull.
Specifications
  • Brand: GRAV
  • Colour: Clear
  • Type: Downstem
  • Joint: 14mm Male
  • Internal Length: 8.5cm or 11.5cm
  • Material: Borosilicate Glass
Shipping Rates & Times

Orders Under $100

  • Australia Post Standard
    Rate: $12.95
    Delivery Time: 3 - 7 days

  • Australia Post Express
    Rate: $14.95 (Under 500g) or $24.95 (Over 500g)
    Delivery Time: 1 - 4 Days

Orders Over $100

  • Australia Post or Aramex
    (Cheapest Available)
    Rate: FREE
    Delivery Time: 3 - 10 days

  • Australia Post Express
    Rate: $14.95 (Under 500g) or $24.95 (Over 500g)
    Delivery Time: 2 - 7 Days

Note: We are unable to guarantee delivery times and the above are estimates. Delivery time depends on your location and shipping option. However, it typically takes 1-10 business days from the date of payment. Your shipping address, weekends, busy trading periods and public holidays may impact shipping times.

  • Australia Post Express
    Rate: $14.95 (Under 500g) or $24.95 (Over 500g)
    Delivery Time: 1 - 4 Days

Orders Over $100

  • Australia Post or Aramex
    (Cheapest Available)
    Rate: FREE
    Delivery Time: 3 - 10 days

  • Australia Post Express
    Rate: $14.95 (Under 500g) or $24.95 (Over 500g)
    Delivery Time: 2 - 7 Days

International Orders (NZ, Canada, USA & UK)

  • Under 500g
    Rate: $19.95
    Delivery Time: 10 - 14 days

  • Over 500g
    Rate: $29.95
    Delivery Time: 10 - 14 days

Note: We are unable to guarantee delivery times and the above are estimates. Delivery time depends on your location and shipping option. However, it typically takes 1-10 business days from the date of payment. Your shipping address, weekends, busy trading periods and public holidays may impact shipping times.
Returns & Exchanges

Returns or exchanges will only be accepted if you have received an incorrect or damaged item. You must contact us within 7 days of your parcel being delivered.

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FAQs

What makes a fission downstem better than a regular stem?

A fission downstem uses smooth, precision-formed diffusion holes instead of rough slits, creating finer bubbles, better cooling, and far less clogging. The result is a smoother, cleaner pull and more consistent performance than a standard downstem.
How do the diffusion slits improve my smoking experience?

Laser-cut diffusion slits create a mesmerising bubble symphony, dramatically cooling and filtering smoke. This innovative design transforms each hit into a smoother, more refined smoking experience.
Is the Glass Diffusor Slider Downstem durable enough for regular use?

Crafted from premium borosilicate glass, this downstem withstands extreme temperatures and resists wear, guaranteeing long-lasting performance and consistent, reliable smoking sessions.
Can I replace my existing bong stem with this Glass Diffusor Slider Downstem?

Absolutely! The universal 14mm compatibility and precision-engineered design make this downstem an ideal replacement, instantly upgrading your bong’s smoke filtration and overall performance.