These Vertical King size bed slats will provide the support you need for most specialty sleep beds and several other types of mattresses. These run the length of the bed from your headboard to footboard sitting on your frame. They will provide a firm foundation with closely spaced slat boards approximately 2 1/2" apart and are approximately 80" long from headboard to footboard. If you need their length to be shorter or longer, just let us know your length in checkout in the note section otherwise they will come in the standard 80" length. They lay directly on your bed frame and are held together with a strapping material ( 3 straps) to keep the slats in position. Please measure the width of your bed prior to purchasing your slats. Allow 1/4" play on either side of the bed frame when measuring. If these are a bit wider than your bed frame, just "scoot" them in a bit.These boards are premium #2 pine wood and come with smooth finished sides and ends. They also have a wax coating and NO chemicals. Our boards we use are on purpose because premium mattresses are expensive so we buy the best boards that are available. If you don't see the size you need for your bed, please contact us and we will be happy to see if we can meet your specific request. **DISCLAIMER: We are not affiliated with any bed manufacturers** Approximately 80 inches long Item is brand new, in the manufacturer's box. It is not seconds, returns or overstock of any kind.