Be.On Stone transition sill cap in black colour. When covering a half-wall with Beonstone panelized stone system, it is important to install a transition sill cap to ensure the waterproofing of your exterior wall. Be.On Stone screwed stone panels come with accessories designed to enhance your living space. Timeless, these accessories are made from high quality neutral coloured concrete that will match with all of our Be.On Stone products and colours. Supplier: Be.On Stone by Permacon Specifications Width: 3 1/2 inches Height: 2 inches Length: 32 inches Weight: 57 lbs