Short Plastic Photo Alphabet (A-Z), No Scale A-FF-1 A blue/green color reaction indicates

A blue/green color reaction indicates the presumptive presence of blood (a positive reaction can occur in as little as one part per million)

Includes: Roller Bag

and its crystal-clear acrylic lens gives you a sharp

simply screw the lid back on the protective container

Short Plastic Photo Alphabet (A-Z), No Scale A-FF-1 A blue/green color reaction indicatesUse these alphabet signs (A Z) with number signs or for designating sequential photography. Dim. 3. 5"w x 2. 625" Tall. Fabricated of one piece . 050" thick polystyrene for long life and durability. They feature a matte finish to reduce reflections and their A frame form allows for nested storage.