A178 is a regular adaptor for 1 7/8″ pile.
A178

Short description of the new custom post type
A178 is a regular adaptor for 1 7/8″ pile.
Adjustable head for foundation support
Adaptor (socket) to screw a 6 5/8″ pile
Adaptor (socket) to screw a 5 1/2″ pile
Adaptor (socket) to screw a 4 1/2″ pile
Adaptor (socket) to screw a 3 1/2″ pile
Adaptor (socket) to screw a 2 3/8″ pile
Adaptor (socket) to screw a 1 7/8″ pile
Foundation support bracket
Fixed U Shaped head 5 1/2” for P238 (6″ x 6″ beam)
Fixed U Shaped head 4 5/8” for P312 (3 pieces of 2″ x 6″ beams)
Fixed U Shaped Head 4 5/8” for P238 (3 pieces of 2″ x 6″ beams)
Fixed U Shaped 3 1/2” head for P238 (4″ x 4″ beam)
Fixed U Shaped Head 3 1/2” for P178 (4” x 4” beam)
Monument Head for P238