The Hamilton 800 Series Microliter syringes exhibit the same handcrafted, precision-fitted characteristics of the 700 Series Microliter (S7905) syringes. These syringes, with their extended metal handles, provide a number of additional benefits and applications over the S7905 syringes. The extended metal handle: improves the balance and handling characteristics; allows use in applications when sampling from test tubes or long-necked flasks; gives finer control of plunger movement and prevents plunger blow-out under high pressures with its adjustable plunger resistance (drag); reduces plunger bending and acts as a guide for the fragile plunger with its strengthened plunger stem; and allows replacement of barrel/plunger assemblies into reusable metal handle, allowing for immediate field repairs. Maximum temperature for Cemented Needle 50° C (122° F) and Removable Needle 115° C (239° F). Maximum pressure rating is 2000 psig except for 250µL which is 1000 psig. These Hamilton syringes can be ordered with a Certificate of Calibration. The Certificate of Calibration will be provided with the product and the procedure is performed with an unbroken chain of calibrations traceable to N.I.S.T. Please request at time of purchase.