... needle* Syringes for Liquid Chromatography0.5,1,5ul Fixed Syringe (for HPLC)--Zero dead volume, Beveled needle10,25, ... Needle Syringes10,25,50,100ul Replaceable Syringe--Replaceable needle250,500,1000,2500,5000,10000ul Luer Lock Syringe--Teflon plunger, Cone-shaped needle ... head secured by a Twist-lock micro liter syringe,micro sample ...