FNF have taken the original Block Jelly and increased the fibre length to 30mm for Block30 while maintaining all the great characteristics of its smaller brother. Block30 is mounted on a micro core making it very easy to use. The fibres have been cut to the smallest possible size allowing for maximum movement and more cut ends to fluoresce light. When the material is left static in the water like on the hang the fibres flair out. The use of Block fibre blended with our Jelly fibre gives Block30 its amazing characteristics.