$20
MidWest Homes for Pets Wire Mesh Pet Safety Gate. Fits the EV studio apartment windows perfectly. 24 Inches High & Expands to 27-41.5 Inches Wide, Natural Wood & White Powder Coated Wire Mesh
https://www.amazon.com/gp/product/B06XPXD2LZ/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
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