Mininum Inside or Outside Radius: 12 in. For Arch Radius: 3 ft. 8 in. Minimum. The flexible panel mouldings from ORAC DECOR allow for out of the box thinking and gives you the ability to create truly unique wall applications. The lightweight polymer is capable of moderate radii (please reference the flexible radii chart) to suit most applications. These mouldings were designed to be installed without profile deformation or causing stress to the mounting surface. Intended to complement the full line of ORAC DECOR cornice and crown mouldings ORAC DECOR flexible panel mouldings, also known as flexible chair rail mouldings, are offered in numerous, period correct designs to suit a wide range of decor. Light, sturdy and easy to install ORAC DECOR's flexible panel mouldings not only provide added decorative refinement, they will protect your walls from the day-to-day unintended impacts from furniture.