... (2)Material:NBR,EPDM,and so on. (3)Size:15*2/16*2/3.6*1.8 and so on (1)Applications ... Silicon, EPDM, Fluoroelastomers, Neoprene, Acrylic resin glue and so on.(3)Colour: red, black, yellow, green, purple, blue and so on ... Size:15*2/15*21/15*2.45/16*2/3.6*1.8/4*1.5/15*2.4/16 ... *2/16*2.65/16*3/16.5*2/15*1.8/16.8*2/14 ... according to specifications required.Factory Pictures: O Ring Colored Made of NBR