>Material: High-quality leather designed for durability and resistance to wear. The washer is treated to maintain its shape and flexibility, ensuring long-term use. >Compatibility: Specifically designed for the Casting Handpump No. 4 model, providing a perfect fit and efficient sealing performance. >Design: Precision-cut and formed leather washer, providing superior sealing capabilities under high pressure and frequent use. >Durability: Leather material is durable, long-lasting, and resistant to abrasion, maintaining its functionality over extended periods of use. >Temperature Resistance: Can perform effectively in varying temperatures, ensuring sealing properties are maintained in both hot and cold environments. >Water Resistance: Leather is treated for water resistance, allowing it to perform well in different water conditions while resisting damage from prolonged exposure. >Leak Prevention: Provides a watertight seal to prevent leakage, enhancing pump efficiency and ensuring proper water flow. >Dimensions: Standard size, designed to fit securely within the Casting Handpump No. 4, ensuring a tight and effective seal. >Environmental Resistance: Resistant to common environmental factors such as dirt, debris, and chemicals, ensuring the washer's longevity even in harsh conditions.