These Manley-size plastic frame provide a strong, durable and reusable alternative to traditional beeswax foundation. Designed for easy handling and long-term use, plastic frames offers several practical benefits for beekeepers. Highly durable: Strong construction makes it less likely to crack or become damaged when using a hive tool. Reusable and cost-effective: Can be cleaned and reused multiple times, helping reduce replacement costs. Resistant to pests: Unlike beeswax, plastic foundation cannot be eaten or damaged by wax moths or mice. Easy hive inspections: The black / yellow colour provides excellent contrast, making it easier to spot eggs and young brood. Easy storage: Can be stored safely at a wide range of temperatures. Excellent during extraction: Strong plastic construction helps prevent foundation from blowing out during honey extraction.