2.8MM TO 4.7MM TREAD. 3.0MM TO 5.0MM TREAD. EXTRA LOAD SEAL INSIDE. MATCHING PAIR. TR21 - TR25. PH1 - PH41 / PH49 - PH50. PA21 - PA38 / PA80. IV1 - IV40 / IV52 - IV54 / IV63.
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