The photo is an example of The blank that you will receive
Tourmaline Chips Acrylic Pen Blank 3/4"x3/4"x5" BTWPBM1062 (1 pc)
BTWPBM1062 
Dimensions: 3/4" square by 5" long -- 19mm x 130mm
Transparency: Normal-Low
Material: Acrylic Acetate
Colors: Green, Pink
Style: Pebble