... 2.ISO 9001:2008 & API spec7-1 3.Stocks adequate&timely delivery 1 Specification: Size8 1/2”(215.9mm)IADC537GBearing TypeElastomer sealed ... 120mm,127mm(5”)130.1mm(5 1/8”),133.3mm(5 1/4”),139.7mm(5 1/2”),142.8mm(5 5/ ... 8(10 5/8”),295.3(11 5/8”)311.1(12 1/4”),346.0 (13 5/8”),349.2(13 3 ... ,622,632,732 7 ISO certification FAQ(Frequently Asked Questions)1. How to order the products? Answer: Send the inquiry ...