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

Basic External Ring Chart shows a selection of sizes available. For full specifications on the BASIC EXTERNAL RING, click the download button.  Size No.     Ring Dimensions d3 t b a d0    STW -  3 2.7 0.25 0.5 1.7 0.7    STW -  4 3.7 0.4 0.9 2.2 0.8    STW -  5 4.7 0.6 0.9 2.4    STW -  6 5.6 0.7 1.3 2.8 1    STW -  7 6.5 0.8 1.4 3    STW -  8 7.4 1.6    STW -  9 8.4 1 1.8 3.2    STW - 10 9.3 3 1.2    STW - 11 10.2 2 3.1    STW - 12 11.1 2.1 3.2 1.5    STW - 13 12 3.3    STW - 14 12.9 2.2 3.4 1.7    STW - 15 13.8 3.5    STW - 16 14.7 3.6    STW - 17 15.7 3.7    STW - 18 16.5 1.2 2.6 3.8    STW - 19 17.5 2.7 2    STW - 20 18.5 3.9