8 Ivomec Titleist Golf Balls. 2 are #4 3 are #1 3 are #2 3 Merck Titleist Balls #2 In the 1980’s Merck AgVet brought ivermectin to market in the form of Ivomec for cattle. These golf balls were give away items from the mid 1990’s. One could call them vintage! 5⭐️⭐️⭐️⭐️⭐️ review of seller. Ships Same Day or Next Day depending on when you place your order. New to Poshmark? Use my referral code when you sign up and create your account. Using my referral code will give you $10 credit in your account that you can use on any purchase! Referral Code: CHACHALOOT