The T-R series is a standard industrial-grade, single barbed tee connector. There is a rib behind the barb to prevent the tubing from rotating. There is no parting line on the barb. This Tee is available in natural and black nylon, Natural and gray PVDF, polyethylene certified NSF 51/61, natural and white polypropylene, HDPE, and glass-filled black nylon. Equal barb connectors come in a range of sizes from 3/32 inch to 1 inch. The reducing barb sizes available for this series are 5/8 inch by 3/8 inch.