in turn in frictional engagement with vertical base pipe portion 42 which is in turn is attached to batting t base 52 referring to fig2 batting t adapter 2 has a lower base 4 which has solid core 6 outside wall 12 lower end 8 and lower outer edge 10 a top end 56 lower base 4 has an upper neck 50 that has a wider diameter than the diameter of lower base narrow section 58 of lower end 8 solid and dense core 6 of base 4 helps to keep batting t adapter 2 solidly supported in telescoping vertical tube 40 of commonly known batting t 39 s 54 most commonly known batting t 39 s have one of two hollow telescoping vertical tube 40 internal diameters the more expensive brands usually have a slightly larger telescoping vertical tube 40 internal diameter of between 1 18 at 1 20 inches the less expensive brands usually have a slightly smaller telescoping vertical tube 40 internal diameter of between 1 15 to 1 16 inches additionally since commonly known batting t 39 s are built from rubber they have some inherent flexibility and are seldom manufactured to precise manufacturing specifications the external diameter of solid core 6 of lower base 4 is preferably 1 165 inches with a manufacturing tolerance of 0 01 inches solid core 6 of lower base 4.