Tetrahydrofuran (THF), widely used as a mobile phase for GPC, attacks the CTFE valve stems and TFE/propylene O-rings used in the standard four valve cap.

• This special THF-resistant version has 316 stainless steel wherever the standard system has CTFE and FFKM O-rings in place of the TFE/propylene O-rings
• This cap is also recommended for aggressive organic solutions such as chlorinated hydrocarbons, ethers and ketones
• Filter diameter of 47 mm

Cap body is manufactured from glass-filled PTFE, and will fit any reservoir or bottle with a GL 45 thread.