1-1/2 x 1-1/2 extended/smooth top P-cap molding - INSIDE Frame Corner
https://www.subwaytile.com/shop/1-1-2-x-1-1-2-extended-smooth-top-p-cap-molding-inside-frame-corner-977
https://www.subwaytile.com/web/image/product.template/977/image_1920?unique=4cdb287
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