The Contacting Type can be divided into A, B, C, DB, DF and DT. Series Item NO. Bore Diameter(mm) 7000 7000~7060 10~300 7200 7200~7248 10~240 7300 7300~7340 10~200 7900 7906~7932 30~160 3200 3200~3222 10~110 3300 3302~3322 15~110 5200 5200~5220 10~100 5300 5303~5316 17~80