The Corning Synthegel Spheroid Matrix Kit is a research tool for high content 3D self-assembled biologically formed spheroid cultures with more accurate in vivo predictions. The matrix has a higher gel strength and optimal cytocompatibility for spheroid culture. The kit consists of a vial of Spheroid matrix peptide nanofiber solution and a vial of Synthegel X-Link solution. The Corning Synthegel Spheroid Matrix Kit is a research tool for high content 3D self-assembled biologically formed spheroid cultures with more accurate in vivo predictions. The matrix has a higher gel strength and optimal cytocompatibility for spheroid culture. The kit consists of a vial of Spheroid matrix peptide nanofiber solution and a vial of Synthegel X-Link solution.