6 colors twist-off semen tubes are available; Toothpaste shape semen tube has opening on the upper end, which can be sealed by manual or automatic dispensing & sealing machines. Fit for large scale farms and AI centers.

Twist-Off Semen Tube, Blue-95ml
Twist-Off Semen Tube, Clear-95ml
Twist-Off Semen Tube, Green-95ml
Twist-Off Semen Tube, Red-95ml
Twist-Off Semen Tube, Yellow-95ml
Twist-Off Semen Tube, Orange-95ml
Ultra Thin Semen Tube – 6 colors (2,000/case)
Twist-Off Semen Tube 172mm – 6 colors (850/case)
Twist-Off Semen Tube 185mm – 6 colors (800/case)