This photography balance card is made of acrylic, which has reasonable design, practical functions, and can work with any digital camera. Simple structureand excellent craftsmanship makephotography balance card have excellent durability. Features -Color:As Shown-Material:Acrylic-Size:8.50X5.40X1.00cm/3.34X2.12X0.39in- Gray card is used to accurately detect exposure, can balance complex light to 18% neutral gray scenes.- Come with neck strap, the card is lightweight for you to use, portable size that makes it easy for you to take with. - White cards are used to define white balance,when shooting outdoors, use black cards to cover stray light. - This photography balance card is crafted from acrylic, durable for long using life, can meet your needs. - Balance card with strap is minimalist and stylish, match your personality and suitable forany digital camera. Packing list: 2 x Photography Cards with Lanyard Strap