A4 & A5 Clear Plastic Envelope Wallets with tuck in flap.
Wholesale A4 A5 Waterproof Clear PVC Envelope Document Bag - China PVC Foleder, PVC File Holder | Made-in-China.com
PVC Envelope Carry Folder A5 – Factory Plaza
MECCANIXITY Zip Envelope File Bags, A6 Size PVC Clear Bill Document Pocket for Office Home, Blue Pack of 40 : Amazon.co.uk: Stationery & Office Supplies
Wholesale a4 pvc envelope For Holding Diverse File Sizes - Alibaba.com