GentleFit™ Dual-Shot Filter Tips are manufactured using a process that combines two resins which provide the user a soft color-coded top collar for universal pipette sealing; and a rigid clear resin base for straightness. This "dual-shot" technology standardizes most research-grade pipettors on three sizes of tips. Additional features include reduced sealing force, minimal ejection force, and reduced wear on pipettors (giving them a longer life). These tips are ideal for multi-channel pipettors and are color coded by volume for easy identification. Tips are pre-sterilized and are certified Rnase/Dnase free.