Samco 252NL-20S Samco 15mL 细管大管泡 Sedi-Pet 滴管, 灭菌, 20支装, 白色盒装 Samco 15mL Narrow Stem Large Bulb Sedi-Pet Transfer Pipets, Sterile, 20/pk, White Box Clinical Consumables 500 4000 2660