Dear Sir,Thank you very much for your emailI am happy to contact you and hope to cooperate you in the furure.We are Manufacturer in building materials in Ho Chi Minh and main products :1/ Concrete spacer : the size which have been exporting to Australia :40x40x40mm,40x40x50mm, 48x50x65mm,48x50x75mConcrete strength:60MPA and package :25pcs per box,Please find attach file , there are some picture of concrete spacer .Thanks and best regardsGeneral DirectorMobile:+84 975 403 180