These images are illustrative and may not match the product exactly. Always verify by part number — or confirm instantly with the assistant using a photo or VIN.
Post Onsite · Body & Cab
TF4013
In stock · ships from Knoxville
This is an indicator window, likely a sight glass, used on tank trailers or other fluid-carrying equipment to visually confirm the presence or level of liquid inside a tank or reservoir.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
We don't publish fitment for this part yet. Rather than guess, get it confirmed against your truck in under a minute.
It is typically replaced when the glass becomes cracked, cloudy, or develops leaks, ensuring safe and accurate visual inspection during loading, unloading, and daily checks.
Part Number: TF4013
INDICATOR WINDOW TF40
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more
