Ikebana Kenzan | Pin Frog 4 1/8 InchJapanese, high quality brass Kenzan. The kenzan, also known in Japanese flower arranging as a pin frog, is an essential tool of Ikebana. Sharp, heavy brass spikes set in a solid weighted base, are used to maintain your arrangement upright in your Ikebana vase or suiban ikebana container. The tightly formed pins expand the stems of your flowers or plants, allowing additional hydration for longer lasting arrangements. This Kenzan includes a non-slip rubber ring to use if additional stability is required. Imported from Japan, these are the best quality kenzan produced. Made to last a lifetime, this large Kenzan measures 4 1/8" inches in diameter.