90 degree elbow size :DN15---DN100 material: plastic ,carbon steel ,alloy steel 90 degree elbowsize :DN15----DN100material:plastic ,carbon steel ,alloy steelstandard : DIN, SMS ,GB ,ISO,JIS ,ASTMhead shape: round , hexagon,or according to your requirementapplicaton: it is widely used in the dairy ,beverage,medicine,irrigation , water ,oil ,petroleum,and othe fluid field. 90 degree elbow