The Natural Material that Fills and Extends

Sustainable
Sustainable
Affordable
Affordable
Renewable
Renewable

Get a Free Sample Kit

For a free sample kit of our in-stock walnut shell, just submit your info below.

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Eco-Shell FAQs

Learn the answers to some of the most common questions we receive about using walnut shells for a variety of industries.

We grow and process English walnut shells at our local California farms.

Yes, we have years of experience shipping globally. Contact us for more information.

All our shells come from local California farms and are grown to meet the highest standard in the country.

Product benefits include being reach exempt, all-natural, non-GMO, pesticide-free, asbestos-free, and having no heavy metals.

Have a Project Walnut Shells May Be a Fit For?

Our In-Stock Filler Size Options

Our sizes are based on U.S sieve standards. Millimeter and inch measurements are approximate. We offer smaller sizes for adhesives, plastics, and rubbers, as well as larger sizes for pin cushions, toys, and decorative plastics.

Download Our Applications & Industries Sizing Sheet

4/6

3.35 mm 0 4.75 mm
0.1320 in – 0.1870 in

6/10

2.00 mm – 3.35 mm
0.0787 in – 0.1320 in

6/20

0.85 mm – 3.35 mm
0.0331 in – 0.1320 in

8/12

1.70 mm – 2.36 mm
0.0661 in – 0.0937 in

12/20

0.85 mm – 1.70 mm
0.0331 in – 0.0661 in

14/30

1.40 mm – 0.66 mm
0.0234 in – 0.0555 in

18/40

0.425 mm – 1.00 mm
0.0165 in – 0.0394 in

20/40

0.425 mm – 0.85 mm
0.0165 in – 0.0331 in

-100

95% passing 100
.150 mm, .0059 in

-200

.75mm, .0029in

-325

.45mm, .0017in
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