nimum quantity is 1 set, as our product is machinery equipment, It’s difficult to send you samples, however,we can send you catalog, warmly welcome you to come visit our company.3. Which level of quality are your products?We have got CE, ISO, SGS, TUV, UL certificate so far.Contact Below:Suzhou Optimal Machinery Co.,Ltd.Add:75#,Jiangpu Road,Suzhou Industrial Park,Suzhou City,China(Post Code：215126)Contact us:Joy Wong Mob/what's app:+86-18861122683Email: wangjing@optfan.com