A9D- vertical loop handle 68" drilled for brake rod

B1- standard straight back frame

C6- solid aluminum nose plate 18"W x 9"D

D5- wheel, 4-ply pneumatic tire on 3-piece bolt together wheel with precision bearing

E11- extruded aluminum stair climber

BTT- tread brake system

E48- self-retracting pull bar with 5/8" kick bar