Welcome to Linear Slot Diffusers and Texas Buildmart. We are a family-owned business, that opened its doors back in 2005 with our first AC Vent Covers selling to local builders. Now, over 17 years later and we are selling more than 20,000 units a month, with over 100 different size AC Vents Covers and 20 different size Linear Diffuser Plenum Boxes to choose from. We have very high stock volumes on each model. Here at Linear Slot Diffusers and Texas Buildmart we never run out of inventory, we are always in Stock and Ready to Ship, all across the Continental US and Canada! When it comes to quality our AC Vent Covers are Durable, Premium, Modern and at a competitive Price!