Part # A B
555-50100 3-3/4 in. 3-3/4 in.
555-50102 3-5/8 in. 3-5/8 in.
555-50104 3-3/4 in. 3-3/4 in.
555-50105 3-7/8 in. 3-7/8 in.
555-50107 3-13/16 in. 3-13/16 in.
555-50109* 2-1/4 in. 2-3/4 in.
555-50110* 2-3/8 in. 2-3/4 in.
555-50150 2-1/2 in. 2-1/2 in.
555-50151 3-3/4 in. 3-3/4 in.
555-50152 2-5/8 in. 2-5/8 in.
555-50156 3-3/4 in. 3-3/4 in.
555-50158* 2-1/2 in. 3-1/2 in.
555-50159 3-3/4 in. 3-3/4 in.
555-50160 2-1/2 in. 2-1/2 in.
555-50161 3-3/4 in. 3-3/4 in.
555-50162 2-5/8 in. 2-5/8 in.
555-50163 3-5/8 in. 3-5/8 in.
555-50164 2-9/16 in. 2-9/16 in.
555-50165* 2-1/4 in. 2-5/8 in.
555-50166 3-13/16 in. 3-13/16 in.
555-50168* 2-5/8 in. 3-1/2 in.
555-50169 3-7/8 in. 3-7/8 in.
555-501000 2-9/16 in. 2-9/16 in.
555-501001 3-11/16 in. 3-11/16 in.
555-501002 2-9/16 in. 2-9/16 in.
555-501003 3-11/16 in. 3-11/16 in.
555-501006 3-11/16 in. 3-11/16 in.
555-501106 3-11/16 in. 3-11/16 in.
555-502140 3-11/16 in. 3-11/16 in.

* Sloped valve cover