95% Al ceramic Out diameter 20 mm, inner diameter 10, length 2000-3000 mm. Out diameter 26 mm, inner diameter 21, length 2000-3000 mm. Out diameter 30 mm, inner diameter 15, length 2000-3000 mm. Out diameter 32 mm, inner diameter 22, length 2000-3000 mm. Out diameter 40 mm, inner diameter 30, length 2000-3000 mm.Supply liner according to your requirements.