This product allows for safe cleaning of caps in washing machines or dishwashers.(note: not recommended for use with agitator washers). locking mechanism keeps hat secure and protected though a washing machine or dishwasher cycle. won’t scratch or damage appliances. Clean three hats at once! set of three cap washers lets you clean up to three hats at the same time. each cap washer measures approximately 8.5 inches in diameter, and 13 inches from front to back. Evelots set of 3 locking baseball cap washer helps you get your baseball cap or trucker style hat clean as a whistle, while maintaining its hard-won shape. Sturdy and durable! lightweight, sturdy plastic frame resists high heat, for years of use. A trusted vermont seller! for years evelots has provided unique products with a 30 day easy return policy, and 100% satisfaction guarantee.