278 STEMX Cylinder

278 STEMX - 4.5"

278 STEMXT Cylinder

278 STEMXT - 4.5" Lens

279 STEMX Cylinder

279 STEMX - 6"

279 STEMXT Cylinder

279 STEMXT- 6" Lens

290 STEM Cylinder

290 STEMX - 8"

290 STEMXT Cylinder

290 STEMXT - 8" Lens