The F4086 is the 2.8 L Erlenmeyer / Fernbach Jumbo Flask — Styrene Butadiene material, baffled bottom, vented screw cap, sterile, individually wrapped — sold at $303 / case of 6 ($50.50/flask). Extends the F40xx Erlenmeyer flask family (F4060-B anchor) with a production-scale 2.8 L jumbo format.
Key Specifications
| SKU | F4086 |
| Type | Sterile Erlenmeyer / Fernbach Jumbo flask, baffled-bottom |
| Volume | 2.8 L (jumbo) |
| Material | Styrene Butadiene (different from F40xx-B polycarbonate) |
| Bottom | Baffled (mixing / aeration) |
| Cap | Vented screw cap |
| Sterility | Sterile, individually wrapped |
| Pack format | 6 flasks per case |
| Per-flask cost | $50.50 |
| Sister jumbo | F4087 (5.0 L jumbo, $427/4) |
| Cap accessory | F4069 (cap pkg 10 for 2.8 / 5.0 L jumbo flasks, $44) |
| Smaller-volume family | F4060–F4063 (125 mL – 1000 mL polycarbonate / PETG) — see F4060-B anchor |
| List price | $303 |
Why a Jumbo Erlenmeyer / Fernbach Format
Production-scale shaking-flask cell-culture workflows require flask volumes well above the standard 1 L Erlenmeyer maximum:
- High-cell-density bioreactor seed-train workflows — final pre-bioreactor passage at 2.8 L scale
- Microbial fermentation pilot scale — sufficient working volume for downstream extraction yield
- Pharmaceutical / biotech production-scale shaking culture — bridge to true bioreactor scale
The Erlenmeyer / Fernbach Jumbo format combines the standard Erlenmeyer narrow-neck shape with the wider Fernbach base for enhanced surface-area to volume ratio, improving gas transfer at production scale. The baffled bottom further enhances mixing.
Pick the F4086 when:
- Workflow needs 2.8 L production-scale shaking flask with baffled bottom
- Bioreactor seed-train final passage at 2.8 L scale
- Microbial fermentation pilot workflow
Step up to F4087 (5.0 L jumbo, $427/4) for 5 L pilot-scale workflows.
Stay in standard F40xx range (F4060–F4063, 125 mL–1000 mL) for bench-scale shaking-culture workflows.
Ordering & Configuration
Pair with cap accessory F4069 ($44 pkg 10) for replacement / spare caps.
Plan reorder cadence — production-scale workflows use jumbo flasks at lower frequency than bench-scale; case-of-6 typically supports moderate pilot workflow.
Confirm at quote: production-scale workflow context, projected reorder cadence, and lead time.
Warranty: Per Benchmark Scientific standard consumable terms.
F40xx Jumbo flask pair: F4086 (this product, 2.8 L, $303/6) and F4087 (5.0 L, $427/4). See F4060-B anchor for full F40xx family detail (including standard 125 mL–1000 mL polycarbonate / PETG range).
