NVacuo #15 Oring Elbow designed with dimensions compatible with all other NVacuo Products to aid with easy assembly and configurable options. These make it easy to mount and dismount flanged U-tubes from NVacuo manifolds and provide countless different setup options. This stands 4 Inches tall and is uses 2 Inches from the center of each flange to the face of the adjacent flange. Requires 15 15 mm ID O-Rings and No. 28 Pinch Clamp for Vacuum Seal. Please call 505-872-0037 for more information.