In the world, there are many different types of instruments and equipment.
Many of them do not have dedicated cases, which can be a concern for storage and transportation.
In such cases, the SKB / 3I Series universal case, designed to be dustproof and waterproof, is a great solution!
The 3I Series is a resin case that even meets the stringent standards of the U.S. military. It is lightweight yet highly durable, and some models come with cushioning foam inside to provide excellent support for your equipment. With a wide range of sizes and options available, you can choose the perfect case to fit your storage needs.
This time, I would like to introduce a list of the main models from the 3I Series, showing their internal dimensions at a glance, as well as details about their specifications!
SKB / 3I Series Main Case Internal Dimensions Chart
All measurements are internal dimensions (cm).
| Model Number | Width | Height | Depth | Image |
|---|---|---|---|---|
| 19 | 8 | 12 |
 |
|
| 24.1 | 10.5 | 18.8 |
 |
|
| 30.5 | 11.4 | 22.9 |
 |
|
| 38.1 | 15.2 | 26.7 |
 |
|
| 40.6 | 14 | 25.4 |
 |
|
| 40.6 | 25.4 | 25.4 |
 |
|
| 43.18 | 16.51 | 16.51 |
 |
|
| 43.2 | 15.2 | 29.2 |
 |
|
| 47 | 12.1 | 33 |
 |
|
| 47 | 17.8 | 33 |
 |
|
| 48.3 | 20.3 | 36.5 |
 |
|
| 48.3 | 20.3 | 36.5 |
 |
|
| 51.7 | 19.1 | 29.1 |
 |
|
| 51.7 | 20.3 | 29 |
 |
|
| 52 | 25.4 | 39.3 |
 |
|
| 52.1 | 19.1 | 39.4 |
 |
|
| 55.9 | 26.7 | 43.2 |
 |
|
| 55.9 | 20.3 | 43.2 |
 |
|
| 58.4 | 35.6 | 43.2 |
 |
|
| 61.3 | 17.8 | 53.3 |
 |
|
| 66.3 | 30.5 | 43.2 |
 |
|
| 73 | 35.6 | 45.7 |
 |
|
| 76.2 | 45.7 | 53.3 |
 |
For detailed product specifications and external dimensions, please refer to the individual product pages.
The product names in the 3I Series use hyphens to separate components of the model number: the middle number indicates the approximate width and depth in inches, the following number represents the height, and the final letter denotes the internal specifications.
Let’s look at the example below.
SKB / 3I-0705-3B-C Carrying Case Dustproof and Waterproof Specifications
① Width: 7 inches, Depth: 5 inches
② Height: 3 inches
③ Includes pre-cut polyurethane foam inside
Once you understand the pattern, it's quite simple. As for the internal specifications, the "C" indicates that it includes pre-cut polyurethane foam, and the details are as follows. We also introduce this in the video.
C ＝ Includes pre-cut polyurethane foam
D ＝ Includes internal dividers
E ＝ No foam included
L ＝ Includes layered polyurethane foam
In the "SKB / 3I Series Main Case Internal Dimensions Chart," I have introduced the C type, which offers high versatility due to its adjustable foam shapes.
Additionally, other models in the series are available with specifications beyond just the C type. Please refer to the list below to find the option that best suits your needs.
→ Other Models in the 3I Series
The SKB / 3I Series offers a wide range of sizes, combining lightweight construction with durability.
If you’re looking for a versatile and user-friendly case, be sure to consider this series!
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