Gardner Critical Mass Putty is a high-density rig putty designed for fine-tuning carp rigs. Its super high density formula provides maximum stickiness, allowing it to adhere easily to all monofilament lines in a range of conditions. The lead-free construction makes it an environmentally safe choice for anglers. It is available in three colours: black, green and brown. - Maximum stickiness - Easy to use whatever the conditions - Super high density formula - Will adhere to all mono's - Lead free design, safe for environment - Perfect for fine rig tuning