1) standards:British(BS),American,DIN 2) banded,beaded,plain;Galvanized and black 3)H, ... ,HB,GF 4)OEm ODM Varous Pipe Fitting1)standards: British standard(BS), American standard, and DIN standard.2)It includes: ELBOW, TEE ... , BENDS, CROSSOVER etc.3)the products vary from 1/2" to 6".4)The products are divided into banded, beaded, plain ...