31317-12-S - 3.5 in Thru-Tee Assembly, Single Tire application31317-12-S - 3.0 in Thru-Tee Assembly, Dual Tire applicationSKU: 31317-12-SContact Us to PurchasePurchase and Shipping InfoATIS Parts by P.S.I. are available through our Distributor Partners only. Please CLICK HERE to submit a spec request contact form. Contact us for more information: Email: info@psitireinflation.com Phone: (210) 222-1926 M-F 7:30am - 4:30pm CT Return & Refund PolicyATIS Parts by P.S.I. are back by a 5-year warranty. Please review the Warranty Statement documentation.