CNBTR Silver Caliper Gauge Machinist Long Firm Joint Metal Measurement Tool Inside and Outside Caliper Pack of 2 (250mm) Blunt-needle Luer hub with stainless steel needle and polypropylene hub for dispensing fluids including epoxies, solvents, fluxes, oils, and pastes Compatible with Luer-lock syringes and squeeze bottles with a Luer-taper cap Dimension:250 x 15mm/9.84 x 0.59inch(L x Blade Width)