Click to expand Tap to zoom Vermiculit 3-6 mm by Hobby Sold out Dhs. 35.50 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Sold out Substrate for the incubation of reptile eggs. Coarse grain size of 3-6mm with improved gas exchange due to increased number of air-filled pores. Recommended for large, hard-shelled eggs.