Kibblewhite Precision Valve Seal 700-100015 All valve seals are made of 100% solid Viton for long life Meet or exceed OEM specifications When using Kibblewhite spring kits, Kibblewhite valve seals must be used because of spring clearances Sold individually; unless noted Stem Dia. 5.0mm - Guide Dia. 0.340in. - Overall Length 0.335in. -Seal O.D 0.395in.