Specifications include, but are not limited to: 1 18" Diameter Tubesheet 113" Long, 3/4" 20 Guage, .035 Cubic Tubes. 30261700 EACH 10 2 18" Diameter Tubesheet, 72" Long, 20 Guage, .035 Cubic Tubes 30261700 EACH 10 3 16' Diameter tubesheet 120" Long, 20 Guage, .035 Cubic Tubes 30261700 EACH 10 4 12" Diameter Tubesheet, 57" Long, 3/4" 20 Guage, .035 Cubic tubes 30261700 EACH 10 5 10" Diameter Tubesheet 84" Long, 3/4" 20 Guage, .035 Cubic Tubes 30261700 EACH 10 6 10 " Diameter Tubesheet 72" Long, 3/4" 20 guage .035 Cubic tubes 30261700 EACH 10 7 10" Diameter Tubesheet 36" Long, 3/4" 20 guage .035 cubic Tubes 30261700 EACH 10 8 8" Diameter Tubesheet 72" Long, 3/4" 20 Guage .035 Cubic tubes 30261700 EACH 10 9 4" Diameter Tubesheet 72" Long, 3/4" 20 Guage .035 Cubic tubes 30261700 EACH 10 10 4" Diamteter Tubesheet 60" Long, 20 Guage .035 Cubic tubes 30261700 EACH 10