The KUFA Sports crab measurer and 7-Inch x 7-Inch Plastic Mesh Crab Bait Bag work great together in any crabbing adventure. The crab measurer is precision cut for accurate measurements. This crab measurer is practically indestructible. This measurer can be used in United States and Canada. In addition, it easy to use measurer is perfect for the recreational crabber. Don't take chances with fines. Make sure you measure accurately with KUFA Sports crab measurer. The bait box product features are plastic mesh material, color black, size: Length: 7-Inch (Length) x 7-Inch (Height) and very easy to install and use. Simply locate where you want to put your Bait Box and strap it in, load it with your favorite bait and catch some Crab. It is that easy.