Micro-Inserts for Short Thread Vials ND9 with wide opening PGL190020 PGL190022 PGL190023 PGL190024 0.1ml Micro-Insert, 31 x 6mm, clear glass, 1st hydrolytic class, 15mm top 0.1ml Micro-Insert, 31 x 6mm, clear glass, 1st hydrolytic class, 12mm top 0.1ml Micro-Insert, 29 x 5.7mm, clear glass, with attached Plastic Spring 0.2ml Micro-Insert, 31 x 6mm,