278 STEM Cylinder

278 STEM - 4.5"

278 STEMT Cylinder

278 STEMT - 4.5" Lens

279 STEM Cylinder

279 STEM - 6"

279 STEMT Cylinder

279 STEMT- 6" Lens

290 STEM Cylinder

290 STEM - 8"

290 STEMT Cylinder

290 STEMT - 8" Lens