for water filter Digital mass flow meter and gray color water flow meter

Hello we are interested to have price quotation to this product.
We would like to purchase few sample for evaluation before ordering by quantity.
Please send quotation for 5 samples pieces and quotatio for order of 100 at a time. 
Our company is NERO'H2O Canaries SL and NERO'H2O doo
www.neroh2o.com 
Please respond to this
thank you 
dr. ivan Dus