SKB iSeries Cases Explained: Sizes, Model Numbers and Best Uses

November 3, 2026
Buying Tips, Brand Spotlight

SKB iSeries cases are injection-molded, waterproof hard cases made from high-strength polypropylene copolymer, and the model number tells you the interior size. A 3i-2217-10, for example, has an interior of roughly 22 x 17 x 10 inches. That naming makes iSeries one of the easiest case lines to size: measure your gear, add room for foam and find the matching number.

What You Get With an SKB iSeries Case

Waterproof and dustproof gasket seal, rated for submersion
Automatic pressure equalization valve so the lid opens after altitude changes
Trigger-release latches that resist opening on impact
Molded-in hinge with no exposed pins to corrode
Interior options including cubed foam, layered foam, dividers and custom inserts

How to read an iSeries model number

The iSeries line prefix.

2217

Interior length and width in inches: about 22 x 17.

-10

Interior depth in inches: about 10.

Popular small and mid-size iSeries cases

Great for meters, drones, camera bodies, medical kits and electronics:

SKB iSeries 2217-10 Case
Price range: $259.99 through $339.99 Select options This product has multiple variants. The options may be chosen on the product page
SKB iSeries 2011-7 Case
Price range: $189.99 through $239.99 Select options This product has multiple variants. The options may be chosen on the product page
SKB iSeries 1813-5 Case
Price range: $134.99 through $194.99 Select options This product has multiple variants. The options may be chosen on the product page

Long iSeries cases for rifles and keyboards

SKB iSeries 5014-6 Case
Price range: $284.99 through $389.99 Select options This product has multiple variants. The options may be chosen on the product page
SKB iSeries 4909-5 Case
Price range: $179.99 through $224.99 Select options This product has multiple variants. The options may be chosen on the product page
SKB iSeries Waterproof 76-Note Keyboard Case
$389.99 Add to cart

Browse every size in our SKB iSeries collection. Worn foam? We stock replacement sets such as cubed foam for the 3i-2011-7.

iSeries vs. 3R Series vs. Pelican

Line	Construction	Choose it when
SKB iSeries	Injection-molded	You want a waterproof case with easy sizing and good value
SKB 3R Series	Rotationally molded	The item is large or ships freight and needs a thicker shell
Pelican Protector	Injection-molded	You want the widest accessory and foam ecosystem

For large equipment, see the SKB 3R Series. For a full brand comparison, read Pelican vs. SKB vs. Zarges. SKB also makes rack cases; see our rack case sizing guide.

Frequently Asked Questions

What do SKB iSeries numbers mean?

The digits give approximate interior dimensions in inches. A 3i-2217-10 is about 22 long, 17 wide and 10 deep inside.

Are SKB iSeries cases waterproof?

Yes. They use a gasketed seal and a pressure equalization valve and are rated for submersion.

Is SKB as good as Pelican?

Both make professional-grade waterproof cases. SKB iSeries often costs less, while Pelican offers more sizes and accessories. The right fit depends on size and budget.

Can I get custom foam for an SKB case?

Yes. AllCases cuts custom foam for any iSeries or 3R case, plus replacement cubed foam sets.

Find your SKB case in minutes.

AllCases stocks a wide range of SKB iSeries, 3R and rack cases and builds custom foam for each, shipping nationwide from Oldsmar, FL. Shop SKB cases or request a quote.

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November 3, 2026

Buying Tips, Brand Spotlight