Earmuffs, Earmuff Style Multi-Position, Noise Reduction Rating 25 dB, Dielectric Yes, Cushion Material Foam, Compatible Manufacturer Model Number HK4, Includes Headband Strap, Cup Color Red, Series Howard Leight QM24+ (R), Earmuff Type Rigid, Standards CSA Class B, Replacement Pad Grainger Part Number 36G714, Band Color Black, Band Material Plastic, Features Dielectric Construction, Weight 0.5 lb, Package Quantity 20