Arrow PC1020 Owner's Manual & Assembly Instructions page 15

Step 4 continued....
9660 Right Post
9671 Center Post
STEP
1 1/8" (2,9 cm)
3
9656
STEP
4
9660 Right Post
1 1/8"
9656
(2,9 cm)
1 1/8"
(2,9 cm)