6000 Medium-Duty Grade-1 Duro Bronze Commercial Door Closer with Delay Action and Standard Full CoverThe Delaney 6000 Series Medium to Heavy Duty Bronze Grade 1 Commercial Door Closer with Delayed Action delivers both safety and function in a single package. Whether dealing with heavy traffic or light, this surface mounted door closer is sure to impress. The 6000 series medium to Heavy Duty door closer is the perfect choice for managing medium to heavy traffic and operates doors up to 330 lbs. Delay action feature with 20 second minimum hold open