• CR3704 Series- 4" Width ADA Compliant Commercial Saddle Threshold• ¼" Height x 4" Width x 48" Length • ADA Guidelines specify that an ADA Compliant door threshold can be no more than ½" tall. Since these are ¼" high, they exceed the height requirements.• Testing has proven that a dam provides a sill with a positive barrier to wind driven air and water infiltration, and is conducive to proper contact between the door bottom and sill, which is crucial to the insulation and maintenance of a structure.• Threshold is drilled for screws• Threshold is fire rated for 3 hours positive pressure.