Specifications: short tube (30cm small and medium dogs), long tube (40cm large dog) outer diameter 4mm                   Each vas deferens is individually packaged, with a pack of 50 pieces.                   Imported blue plastic material, UV disinfection, high-end pregnancy on both sides of the front end, the tail is directly connected to the syringe Uses: artificial insemination to avoid cross-infection, excellent care, improve pregnancy. Performance advantages: Customers who have experience in insemination or inexperience can use it.                   Direct operation, safety and hygiene, and low cost. How to use: 1. Insert the dog into the cervix and adjust the position.                   2. Insert the parallel inward into the position of the uterus, and help.                   3. Inverted, the temptation continues deep into the uterus.                   4. Slow insemination.                   5. The outside is about 8 cm left.