Catalyst Synthetic Short White Blade Mini Blade 5A NEW KIND OF TOOL MADE OF ENGINEERED SILICONE AND NYLON Size 65mm x 35mm Catalyst Mini blades are made out of flexible silicone that is heat resistant, solvent resistant, dishwasher safe, and approved food safe by the FDA. These great features combined with their new shapes and convenient sizes allow for extensive creativity with cake decorating, food crafting, ceramics, plaster, and heavy acrylic media.