Sufficient quantity for AI breeding: the package contains 20 sets of dog breeding kit, including 20 pieces insemination catheters, 20 pieces plastic centrifuge tubes, 20 pieces semen collection bags, adequate quantity to undertake AI dog breeding Proper size: the length of the insemination catheter is 30 cm, both centrifuge tubes and measuring syringes without needles are 5 ml, the suitable size of the breeding kit fit for small and medium animals breeding Insemination catheter: made of PVC material, the catheter is flexible that it can be bent randomly, not easy to crack and deform; Each catheter is individually packaged, with smooth , it is reliable and secure for animals breeding About centrifuge tubes: the centrifuge tubes are designed with screw caps, which can prevent semen leakage, its smooth and flat inner allows it to have no residue; There are white clear marks to read clearly Applicable scope: the artificial breeding kit is appropriate for small and medium sized breeds, such as dogs, goats, sheep, pigs and other breeds, practical and useful tool for artificial insemination. Material: PVC colour: white+blue Package Contents: 20 x deferens (30cm) 20 x semen bags 20 x centrifuge tubes (5ml) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.