VERSATILE COMPATIBILITY Ideal for both solid and perforated flasks, these rubber sprue bases accommodate a variety of casting needs. EFFICIENT TREE SPRUING Designed for tree spruing with multiple pieces on each tree, enhancing your casting process and productivity. SECURE HOLD Features a round button that securely holds a 516 8 mm sprue, ensuring stability and precision during casting. LEAKPROOF SEAL Guarantees a leakproof seal when casting, preventing unwanted spillage and ensuring clean, accurate results. DURABLE NATURAL RUBBER Constructed from highquality natural rubber, offering durability and reliability for repeated use in casting applications.