The Semen Filter Sock is a 2.25 inch x 5.5 inch sock filter, designed for use with most stallion collection systems - whether disposable or baby bottle. This is the version with the orange-colored stripe down its length. Many breeders like to assemble their own kits, mix and match components, or reuse certain components, so they'll get their supplies separately. Semen collection components range from filters to liners to bottles.