... of bearing seal.Main Type Available Size: 6",6 1/2",7 1/2",8 1/2",9 1/2",9 5/8",9 7/8",12 1 ... the seal performance. Main Type Available Size: 5 7/8",6",6 1/2",7 1/2",7 7/8",8 1/2",9 1/2",9 5/8 ... ",9 7/8",12 1/4",14 3/4",17 1/2", etc ... 120 decibels. Main Type Available Size: 8 1/2",9 1/2",9 5/8",9 7/8",10 5/8",12 1/4", etc. IADC Code ...