Allflex Colored Piston Rod Knobs : 3pk Group_Alpha 7 The sharp cutter assembly includes

The sharp cutter assembly includes a double acting system that ensures the sample is always pushed in and sealed into the sample tube

so you feed less than most other brands

single-use carbon steel blades with 5-year shelf life

(S)-Methoprene (CAS #65733-16-6)

Additionally

Allflex Colored Piston Rod Knobs : 3pk Group_Alpha 7 The sharp cutter assembly includesColor code your injection system with interchangeable colored knobs. Dedicate a particular colored knob to a selected vaccine or antibiotic compound to insure proper administration and avoid mistakes. Available as a 3 pak; red, blue, and yellow. Use with the Allflex Repeater syringes.