Kataoka Sangyo U-Groove Dust Tray for 150mm

This is the Kataoka Sangyo Dust Tray DTU15, which fits into U-shaped ditches to catch fallen leaves and debris.
I am selling it because I ordered the wrong size.
It is brand new and unused, but I have removed the sticker that was on the product, apologies.

--Quoted from official information below--
This is a debris catcher for U-shaped ditches. Made of stainless steel, it is rust-resistant and stays beautiful for a long time.
It is installed by sandwiching it between the grating for U-shaped ditches, making it difficult to tip over and easy to install.
The dust tray is shaped to fit the U-shaped ditch, so it catches debris securely without gaps.
The top of the dust tray is open, so even if debris accumulates, water will not overflow and stagnate.
Unlike other products, it has a debris catcher, so you can easily dispose of accumulated debris simply by lifting it. The mesh of the lower receiving part is fine, so it does not let small debris escape.