Reducing couplings has UL, FM and iso9000 certificate . GROOVED TEEBrief introduction SIZE FROM 11/4-8,THE MAX WORK ... machine. Being subjected to close check throughout the production on all measuring tools, cutters and other instruments our pipe fittings ... etc standard thread. Regularly available are the following items: Elbow, tee, cross. Socket, union, bushing, backnut, flange, nipple, etc. The ...