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Grain Trailer Observation Window
Close-up photo of a Grain Trailer Observation Window on a grain trailer

A Grain Trailer Observation Window (also called sight window or sight glass) eliminates the need for climbing in order to monitor the loading/unloading process. Suggested locations of the window include either the side of the trailer and above the hopper bottom.

Estimated Cost Cost range: $75-$100

Limitations Limitations Addressed by Product: Lower extremity, Upper extremity


SourceThunderstone Manufacturing, LLC
3400 West O Street
Lincoln, NE, 68528
Websitewww.thunderstonemfg.com
Emailsales@thunderstonemfg.com
Phone402.435.4249
Fax402-435-4249

SourceWilson Trailer Company
P.O. Box 6300 (4400 South Lewis Boulevard)
Sioux City, IA, 51106
Websiteshop.wilsontrailer.com
Emailservice@wilsontrailer.com
Phone800-798-2002
712-252-6500
Fax712-252-6510
Last updated: May 19, 2025


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