Triforest Flooring - Toucan B-09-10 MDF Primed Quarter Round 5/8" x 5/8" x 10' The B-09-10 Quarter Round is a versatile finishing trim that adds a subtle yet polished edge between flooring and baseboards. Measuring 5/8" x 5/8", it’s ideal for concealing expansion gaps while providing a smooth, curved transition that complements any style of flooring. Made from primed MDF, it’s easy to paint and install, making it a go-to choice for achieving a clean, professional look in both residential and commercial spaces. Category: Quarter Round. Brand: Triforest Flooring. SKU: B-09-10.