Fully Welded, Airtight, Stronger than most competitor’s products.Tee on Tapers are needed to reduce static pressure in your dust collection system and improve the overall performance. Tee on Tapers are used in locations where the combination of lateral tee and reducer may be planned.Many others sizes of Tees available, call 800-367-3828 for quoteClick here for Tech Data on Tee on Tapers