Flour sale kupang / shells good for mixed diet of laying hens and ducks, can save costs pakan.baik also for the manufacture of crackers mix to 10% . crude protein content: 6.0428% Calcium content: 16.5305% . HUB.EMAIL: roysanjaya20@ yahoo.co.id SMS / Phone 031-71428282, 081231044474, 031-7860169