Flower display holder for your cemetery monument vase - 3.5 inch diameter vase opening. MADE IN THE USA Introducing the all new Onvase Sentinel. The Sentinel inserts into your loved ones cemetery monument vase opening and keeps your flowers secure to the monument. No need to use that awful green foam ever again. The flowers are kept upright and secure as if they are planted into the monument. The sentinel also covers the opening and prevents leaves, grass clippings and other refuse from collecting in your monument. The Sentinel does not hold any water so there is never a habitat for disease spreading mosquitoes to breed. To use the Sentinel all that is needed is a flat screw driver and your choice of flowers. Simply insert your flowers into the flower opening and tighten the retainer screw then place the assembly into your monument and you are done, that simple. The flower opening will accept any flower or group of artificial flowers up to 1/2 in diameter. The Sentinel is proudly hand crafted in the USA from locally sourced materials. Please be aware that the FLOWERS, VASE AND TOOLS ARE NOT INCLUDED and are shown for demonstration purposes only.