550101                                    Al oxide,single head
550102                                    Al oxide,dual head
550103                                    Al plated,single head
550104                                    Al plated,dual head
550105                                    Zinc Alloy,single head
550106                                    Al plated,education
550107                                    Al oxide,single head,child
550108                                    Al oxide,dual head,child
550109                                    Al,single head,color
550110                                    Al,dual head,color
550111                                    Varied using
550112                                    Copper plated,single using
550113                                    Copper plated,double using
550114                                    Copper plated,horn head
550115                                    Copper plated,bowl style
550116                                    Stainless steel