Tension Springs Plastic coated tension springs. available in the following sizes: 14.75″ 15.75″ 16.75″ 17.75″ 18.75″ 19.75″ 20.75″ tension springs are measured from hook to hook Seat plates also available Category: Springs Related products Springs – Continuous Roll View product Double Coned Springs [12 gauge] View product Tension Springs Plates View product Double Coned Springs [8.5 gauge] View product