... master 100% compatible for Riso, Duplo, Ricoh, Gestetner seriesProduct Name: CR B4/ A4 master Feature:1. Stable quality with competitive price2 ... out-looking6. OEM service can meet specific requirementsSpecifications:1) Model: CR-B4a) Dimensions (W x L): 270mm x 100mb) Inside diameter ... within 10 dayse) Packing: OAT or Neutral packing 2) Model: CR-A4a) Dimensions (W x L): 227mm x 100mb) Inside diameter ...