STONE Administers a single bolus via an oral route of administration. Available in assorted vinyl head sizes to accommodate administration for a variety of adult animals, as well as calves and sheep. Overall length on Cow Balling Gun is 18"; Calf & Sheep is 12" in length. Vinyl heads can be interchanged on the same shafts. Thumb and finger rings are zinc die cast. Plunger body shaft made of brass and plungers are aluminum. F15-D6 Cow - 18"L, 1/2" head F15-D6-1$11.22 Cow - 18"L, 5/8" head F15-D6-2$16.84 Cow - 18"L, 1" head F15-D6-3$17.86 Calf & Sheep - 12"L, 1/2" head F15-D6-4$14.16 Calf & Sheep - 12"L, 5/8" head F15-D6-5$16.37 Questions? Call toll free 1-800-892-6978 or email us at info@animalhealthusa.com