Envision Indirect/Direct 8" x 3" RoundedENM4 1 T5/T5HO, ENM4 1 T8 INDIRECT/DIRECT, ENM4 2 T5/T5HO, ENM4 2 T8 INDIRECT/DIRECTHousing AA 6063 T6 extruded aluminum forming an 8" x 2 9/16" rounded channel.Die - formed specular aluminum.Satin anodized or white paint standard; custom colors available.Specify 120 volt, 277 volt, or 347 volt. UL and C-UL listed and labeled. 4'-0-1/4", 8' and 12' lengths in a single section for suspension spacing of 4', 8' and 12'.Refer to specification data sheet for specific product information