Sports balls: prescribed input compositions and quantities set import norms and require imports to be used in export products. Standard Input-Output Norms prescribe composition and per-unit input quantities for manufacturing size-5 sports balls, including synthetic rubber Nitrile/SBR (rubber compound minimum 160 gms 5%), specified layered fabrics, butyl/latex bladders, rubber/PU adhesives and ink. Deleted sub-items and a suspension note are recorded. The norms govern determination of input proportions and require applicants to ensure imported goods are those used in the export product, with per-unit quantities provided for compliance verification.