B3051C : Dia (OD) 457 mm. / (ID) 92 mm.
B3052C : W 457 * H 457 mm.
B3117C : Dia (OD) 445 mm. / (ID) 92 mm.
   
B3118C : Dia (OD) 457 mm. / (ID) 92 mm.
 
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