OCHIAI Products are available from MARYLAND METRICS
You may use our RFQ (request for quotation form)
web: mdmetric.com        e-mail

Basic Internal Ring Chart shows a selection of sizes available. For full specifications on the BASIC INTERNAL RING, click the download button.  Size No.     Ring Dimensions d3 t b a d0    RTW -  6 6.7 0.4 0.7 1.6 0.8    RTW -  7 7.7 1.7 0.8    RTW -  8 8.8 0.9    RTW -  9 9.8 0.6 1.1 2.2    RTW - 10 10.7 1 1.5 2.8 1.2    RTW - 11 11.8 3    RTW - 12 13 1.7 3.1 1.5    RTW - 13 14.1    RTW - 14 15.1 1.9 3.6 1.7    RTW - 15 16.2    RTW - 16 17.3 3.7    RTW - 17 18.3 3.8    RTW - 18 19.5 2.4 4    RTW - 19 20.5 2.5 2    RTW - 20 21.5 2.5