The Sherpa Wall Reference System from Durable has with 10 glare-free sleeves with 20 viewing sides made of environmentally friendly polypropylene. Its contemporary design includes rugged frames in assorted colors - two each in black red dark blue green and yellow. The Sherpa Reference System s wall bracket is specially angled to keep sleeves open. The system is easily expandable by adding multiple wall systems sided by side. Included are 10 letter size sleeves (20 viewing sides) 10 snap-on tabs wall bracket and wall mounting hardware. Also available with frames in light gray (DBL5541-10).