In 23 * 11 * 8 cm/piece of floral foam quality standards: 1. An open-celled phenol foam that readily absorbs water and is used as a base for flower arrangements. 2.Foliage green in color. 3.Density: 25KG/M³ 4.Water absorption time: ABT. 1 minute (60 secs) 5.Dry brick weight: 45g(+/- 3g) 6.Wet brick weight: 2000g (+/- 15g) 7.Water drainage / leakage: 0g 8.Cell Structure: Fine 9.Brown water: No 10.PH level: PH 5.8-6.5 11.Water retain period: 7 days & above (Depend on the local climate)