Our gas list is only for the reference of customers when they choose. Customers can choose from the gas list one to six kinds of gas and range they need to test. We will recommend the most suitable pr...
Yes, we welcome sample order for checking quality, but the freight need to be paid by buyer in advance.
Sample needs 2-5 days,We usually ship by DHL, UPS, FedEx or TNT, mass production time needs 7-15 days for order.
Yes, we offer one year quality guarantee for our products.