What size flap does this come with the 5,6 or 7 inch?

5" Tall x 7" wide at bottom triangle. Pete - Goten Builders Farmtech

will this work on a wheat flour silo?

I don't know, we use them for bulk inshell peanuts and they work great. Honestly, I don't see why they wouldn't work, I'm just not should how wheat flour flows. It is just a flapper inside the tank and as peanuts pile up, they press against the flapper. It a not 100%, but close.

Grain Bin Level Indicator | Desertcart French Polynesia

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Description

🌟 See it. Know it. Own it. The ultimate bin level game-changer!

RELIABLE DURABLE - Weather-resistant plastic design built to last through every season.
INSTANT VISUAL ALERT - Bright 3M lemon yellow signals when your bin is full, visible day or night.
SAFETY FIRST ALWAYS - Monitor bin levels without climbing—keep your feet on solid ground.
EFFORTLESS INSTALLATION - Mounts from outside the bin in just a few simple steps—no tools or hassle.
UNIVERSAL COMPATIBILITY - Works with a wide range of granular materials from grains to cement powders.

The Grain Bin Level Indicator by LTJ Enterprises is a highly visible, easy-to-install device that instantly signals when your granular materials reach a preset level. Using a bright 3M reflective yellow film, it ensures clear visibility from over 300 feet away, day or night. Designed for safety and efficiency, it eliminates the need for climbing, supports materials weighing 5 to 100 lbs per cubic foot, and fits a variety of bulk solids including grains, pellets, and powders.

Specifications

ASIN	B0085AKUFC
Best Sellers Rank	#412,392 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #634 in Levels
Color	Yellow, Black
Customer Reviews	4.7 4.7 out of 5 stars (4)
Date First Available	May 22, 2012
Finish	black
Item Package Quantity	1
Item Weight	1.05 pounds
Item model number	540
Manufacturer	LTJ Enterprises Inc
Material	plastic
Part Number	540
Product Dimensions	10 x 10 x 5 inches
Usage	Grain Bin Level Indicator

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