Connect two pieces of Strut Channel at a 45 or 90 degree angle.
B103
$55.81 /Box of 25 Only $2.23 Each
B261-18
$15.43 /Each
B101S
$9.65 /Each
B231
$1.77 /Each
B248
$4.19 /Each
B154
$3.36 /Each
B104S
$12.83 /Each
B232S
$16.73 /Each
B101
$1.68 /Each
B368
$4.84 /Each
B104
$3.92 /Each
B155
$1.89 /Each