The 1 mm connector is designed to attach pulled glass pipettes directly to a small hub RN connection. The RN nut compresses the conical PFA ferrule into the PEEK cup ferrule creating a seal between the syringe barrel and the glass capillary tubing. The connection requires no modifications to the glass capillary tubing. The RN Compression Fitting 1mm consists of one large bore RN nut, 5 PFA ferrules and 5 PEEK cup ferrules.