1. how can we guarantee quality? Always a pre-production sample before mass production; Always final Inspection before shipment; 2. why should you buy from us not from other suppliers?Reply w/i 1 hour in working day. .ISO9001\ISO140001\ISO45001 3. what services can we provide? Accepted Delivery Terms: FOB,CFR,CIF,EXW,FAS Accepted Payment Currency:USD,CNY; Accepted Payment Type: T/T,L/C Language Spoken:English,Japanese 4.Can I have a sample? Sure,we will send the sample for you to check the quality.