with these large opening vials. •24719, 24720 Glass insert, conical bottom, 6 x 29mm •24721 Glass insert with bottom spring, 6 x 29mm •24722 Polypropylene insert with bottom spring, 6 x 29mm •24717, 24718 Glass insert, conical bottom, 6 x 31mm •24715, 24716 Glass insert, flat bottom, 6 x 31mm