Features: Made of Heavy Duty ABS Resin with scratch resistant finishes. Tested to withstand an excess of 300 pounds. Comes with an adjustable rustproof Damper Box that provides full air flow with no rattling. Diswasher Safe for quick and easy cleaning. No Sharp Edges! Quality machining guarantees smooth finishing to insure safety. Measuring for your Floor Register Learn how to measure your floor register! Click the link below to learn which measurements you need to take before purchasing a floor register for your home. How to Measure For Your Floor Register Click the link below to visualize how a floor register will look in your floor. How a Floor Register Sits in your Floor Common Wall Register Sizes The chart below details the most common wall opening sizes and the size of the registers that fit in them. All of our registers are measured based on the opening size of your wall. All sizes below are not available in all styles. Please call if you don't see your size and we'll try our best to get you a custom one! All sizes approximate. Floor Opening Size Register Size (W x L) 2" x 12" 3 3/4" x 13 1/2" 4" x 10" 5 1/2" x 11 1/2 4" x 12" 5 1/2" x 13 1/2"