The elastic modulus of the ready-to-use VitroGel is about 100-300 Pa. Please keep in mind, the elastic modulus (G’) was tested by dynamic rheometer. The G’ is different than stiffness (Young’s modulus). A simple conversion between G’ and stiffness is 1:3 (100 Pa of G’ is about 300 Pa of stiffness). Therefore, the stiffness of ready-to-use VitroGel is about 300-900 Pa.