plastic
Maxxima M84454 Strip Lighting, 13-2/5" L, 2/5" H, 9/10" W
The plastic used here is impact-resistant, surviving drops from a workbench without any damage.
NEW LOT Lovejoy L-075 Individual Coupler & Spider Insert KIT 0.625 5/8" Bore
A nice feature of the T199362ACC is the adjustable height settings.