Quicklock 2000 Universal Bovine AI Gun Use_Fencing Insert sheaths are designed to

Insert sheaths are designed to use with the Dual-Mate guns

Inside diameter on one end is 5/8" and the other end is 1/2"

There are 3 sizes of digits available and both are available as full kits which include:  the dry ice gun

This innovative bolus delivers a dual-action calcium release

Quicklock 2000 Universal Bovine AI Gun Use_Fencing Insert sheaths are designed toA Quicklock 2000 Universal Bovine AI Gun is used with all sheath and semen straw sizes. The special design of the tube provides an exact centering of the semen straw no matter which diameter or length. The plunger is secured against dropping out. After insemination, the semicircular snap is pulled back and the sheath and straw are removed. 18" L. Made in Germany.