- Solution overview
- System Specifications
- Evaluation Criteria
- Documentation
Solution overview
The KT400D Flexi-Fit Ultra Cold is a specialised cold chain packaging solution designed for the Life Sciences and Healthcare sectors. It’s engineered to safely transport temperature sensitive products such as sensitive biologics, pharmaceuticals, and even dairy products requiring an internal temperature of below -60°C / -76°F throughout transit.
Its unique cardboard pack outs, robust external casing, and dry ice-free design help maintain product quality without the need for intervention. This thermal packaging solution suspends sensitive products away from extreme cooling sources, delivering consistent load space for over 120 hours.
The KT400D Flexi-Fit Ultra Cold meets strict industry standards and quality standards expected in regulated environments. It’s an ideal chain packaging solution where temperature monitoring and long-duration thermal stability are critical. Whether transporting gel packs or high-value specimens, it helps maintain the integrity of the payload throughout the journey.
System Specifications
KT System | Temp Range | External Dimensions | Internal Dimensions | Tare Weight |
---|---|---|---|---|
KT400D 157 packout | <-60°C / <-76°F | L 1200mm x W 800mm x H 1050mm | L 885mm x W 460mm x H 595mm | 214kg |
KT400D 127 packout | <-60°C / <-76°F | L 1200mm x W 800mm x H 1050mm | L 789mm x W 537mm x H 509mm | 226kg |
KT400D 025 packout | <-60°C | L 1200mm x W 800mm x H 1050mm | L 705mm x W 454mm x H 588mm | 228kg |
KT400D 219 packout | <-60°C / <-76°F | L 1200mm x W 800mm x H 1050mm | L 730mm x W 565mm x H 515mm | 226kg |
Evaluation Criteria
- 120 hours product performance <-60°C / <-76°F
- Can be pre-conditioned and pre-configured ready for shipment
- Unique pack-out options allowing for a multitude of different pharmaceutical packaging alternatives to be transported safely, simply and easily.
- Suitable for wide and narrow bodied aircraft and all road vehicles.
- Fewer than 0.1% temperature excursions on average (data supported from over 15,000 shipments)
- Easy load and unload process through top door access
- No external power or human intervention required during transportation
- Integrated blue tooth data logger (RTCA DO 160G Part 21 H Compliant)
- Operational Qualification completed to customer loading and shipping specification.
- Global Qualification with near zero thermal mass which stress the containers far more than step tests, reducing associated documentation by half.
- Fully reusable circular supply chain solution.
- Easy and quick reconfigure for subsequent shipments.
- Global availability through our global hub network within 24 hours or less
- Global assurance, used by a wide range of pharmaceutical companies organisations
- Under 60 seconds product load time creates minimal exposure to dry-ice and no stress to product during loading
- No dry ice top up so no risk of compliance failure or breakages
- 120+ hours consistent -80˚C to -60˚C air temperature is created throughout the payload
- The product is suspended throughout transit reducing risk of breakages
- Load space is consistent throughout transportation
Documentation
KT400D Tower Flexi Fit Ultra Cold
The KT400D Tower Flexi Fit Ultra Cold is ideally suited for the transportation of:
Primary Packaging:
- Sartorius Celsius® FFT shell system
- Varying drum sizes
- RoSS® containers
- Mylar bags
- HDPE bottles
- Nalgene bottles
- Single API drums
- Clamshells
- Cryoboxes
- Cylinders
- Mueller drums
- CurTec drums
Life Science Products:
- All vaccines, including C19 vaccines and ABIs
- API & diagnostic kits
- Biopharmaceutical solutions
- Diagnostics specimen samples
- Cell lines bacteria
- Micro organisms
- Proteins and other samples and solutions
- Clinical trial kits
- Any other product requiring a stable temperature environment for transportation

Data loggers are built into all Tower containers, logging internal temperatures from -95°C (-139°F) up to 50°C (122°F). Users can get text or email notification of temperature excursions, as well as automatic data downloads throughout the transit (in-flight excluded) from loggers within range of the CX Gateway device. The loggers are built to FDA, USP, EU and WHO standards.
The KT400D flexi-fit ultra cold container is designed to be used all year round to all destinations using one packaging instruction – avoiding extra levels of complication and uncertainty within either validation or operational control.
Tower’s global network operates common processes and standards delivering consistency for customers. The network offers customers access to the complete range of Tower’s products with a local team of experts available to understand specific customer needs: this ensures that Tower delivers, where and when needed.
Tower cold chain recognise the role we play in working with our stakeholders to move from a linear supply chain to a circular one – providing a solution that supports our mutual ambition of waste reduction through reusability keeping our containers in use for longer reducing the need for disposal and recycling of temperature controlled packaging.