Shelf is needed to install uv and/or solar sensors.

This is a very simple item to add to your ISS. I do think the price is a little bit inflated though for something that is plastic.

Overall satisfied with the item and the purchase process

This mounting shelf is designed for the UV and solar radiation sensors. It installed easily as does all Davis Instruments devices. Very pleased with all of the items and service from Scientific Sales. I am a returning 8 year customer. Thanks!

This works as intended. Great price and fast shipping. You need to do business with Scientific Sales.