DURABLE TO USE, NO HURT ON UTERUS --- The artificial insemination catheter is made of high-quality PVC material, which is flexible, smooth and harmless to the environment and harmless to dogs or sheep. The 360-degree bend does not break easily and is durable. 30MM FOR SMALL ONES, 40MM FOR MEDIUM AND LARGE--- Two different size for small medium or large dogs, as picture shown, 40mm length for large breeds using, 30mm for small and medium ones. VARIOUS CONFIGURATION --- Our insemination rods can be used with syringes, bottles and bags, which are suitable for most inject vessel. Rubber band on the rod end is elastic with good friction that frimly match with your inject tools. INDIVADUAL PACKAGE FOR DISEASE SPREAD --- Each insemination catheter is individually packaged, disposable, healthy and safe, and does not spread disease between animals. It effectively does a good job of prevention of infectious disease . WIDE VARIETY APPLICATION --- This disposable catheter is especially suitable for artificial insemination of dogs, goats, sheep and the like. This is the best artificial insemination method for pets.?Wide Variety Application?: This disposable catheter is especially suitable for artificial insemination of dogs, goats, sheep and the like. This is the best artificial insemination method for pets. ?Indivadual Package for Disease Spread?: Each insemination catheter is individually packaged, disposable, healthy and safe, and does not spread disease between animals. It effectively does a good job of prevention of infectious disease . ?Various Configuration?: Our insemination rods can be used with syringes, bottles and bags, which are suitable for most inject vessel. Rubber band on the rod end is elastic with good friction that frimly match with your inject tools. ?30cm for Small Ones, 40cm for Medium and Large?: Two different size for small medium or large dogs, as picture shown, 40cm length for large breeds using, 30cm for small and medium ones. The error is between 1-2 cm, please understand. ?Durable to Use, No Hurt on Uterus?: The artificial insemination catheter is made of high-quality PVC material, which is flexible, smooth and harmless to the environment and harmless to dogs or sheep. The 360-degree bend does not break easily and is durable.