1. Material and Size The head of this caulk kit is made of rubber and handle is made of ABS. The 8.6inch comfortable handle has 4 different tip sizes, about 0.8inch, 1.1inch, 1.4inch and 1.7inch. It can ensure to apply sealant evenly on uneven surfaces, saving material time. 2. Caulking Kit a set just for you, our product includes a versatile set of 4 different sized rubber caulking finishing tools that are suitable for both and beginners; They are easy to use, making your caulking and grouting tasks simpler; These tools help you accomplish your tasks efficiently 3. Washable and Reusable Each caulking finishing tool is reusable. After using, simply rinse or wipe with water or a damp cloth. Once it gets dry, you can store it for next use. Note: Please wipe off stains before drying. 4. Smoothing Tool with its various sizes of tips, it can easily fit into nooks and corners, effectively smoothing the applied caulk for a better, neater finish; Whether you're a builder or a DIY enthusiast, this tool is the choice; It works efficiently on different surfaces and materials