Hi Seller, It is nice to write to you. This is Mario Alexey from Peru. I am interested in adding your DIFFERENTIAL BLOOD CELL COUNTER 2, 5 & 8 KEYS to my inventory. may I know more information about product such as: Properties, Model Number, Type, how long will it take to receive shipment by air? thank you, and I look forward to hearing from you. kind RegardsMario AlexeyMARIO PICKMAN Show More