... 0.5L, 1L, 2L, 3L, 5L Product Description Material: quartz glass / 1Cr18NI9Ti (optional special material) Pressure:-0.1-1.6MPa (≥ ... 2L to 0.8MPa) Temperature: ≤ 220oC Visible tube is made of double-transparent quartz glass tube. The upper and lower lid is with ... metal materials, the intermediate layer is beated by a high-transparent thermal conductivity tube ...