1.Name:Inner Corrugated Handwheel 2.Certificated:ISO9001:2000 3.Material:Cast Iron, ... Iron,Plastic,Bakelite(2) Type: Bakelite Handwheel,Double Spoked Handwheel,Inner Corrugation Handwheel,Back Corrugation Handwheel,Papilionaceous Type Handwheel ,Foldable Handwheel ...