rubber bellows,corrugated tube,corrugated pipe, 1.non-stick finish, easy to clean,durable,tasteless 2. ... optional. 10.Silicone,Viton,Neoprene,Hypalon, plastic products PC,nylon,ABS,HNBR,EPDM,ACM,ACM,CR,NBR,NR etc.11.FDA ... ,silicon rubber,Automotive Part,Cake mold ,Silicone baking mold. corrugated pipe