The T1 Bander is designed to do cattle of any size.  It works by pulling the tubing tight and clamping the tubing in place around the scrotum above the testicles.

The Tri-Bander is designed to castrate bulls from newly born up to 400 lbs.  Simply open the band place over the scrotum hold in place and release the bander.

The XL Bander is designed for bulls from 250 through 750 lbs.  Works just like the Tri-Bander.  The band opens up large enought to put a tennis ball through.