embodiment a volume percentage of 0 5 is noted hence in the embodiment noted above a compound formula of 11 lbs of tungsten powder per 100 lbs of rubber is utilized once the compound is produced it is then cured and slit as is normally done in the conventional thread manufacturing process other suitable thread manufacturing processes and or materials may also be employed to increase the specific gravity of the thread to a value greater than 0 94 more particularly 0 96 and greater even more particularly 1 00 and greater and still even more particularly 1 2 and greater this may be achieved by employing highly resilient polyurethane tpes or any other known materials having a specific gravity of 0 94 more particularly 0 96 and greater even more particularly 1 00 and greater and still even more particularly 1 2 and greater either with or without the addition of high sg fillers which would provide the functional properties necessary in its use and also the increased specific gravity that would lead to an increased moment of inertia in the ball the dimension of the thread ranges from 0 008 0 028 u00d7 0 015 0 125 inch while in one.