Ultrasonic Roller is used for ultrasonic lace sewing machine, cutting, sewing, color printing,etc Ultrasonic roller:1.Material:alloy steel(CR12)2.Siez:23*51MM/50*51MM*100*51MM*150*51MM,customized size accpetable3.Special heat treatment for long time life span4.Application:curtains,lace, christmas ornament, ribbon,mask,non woven disposable,etc