<p>Package included:</p><p>4PCS 12inch Valve Extension Stem + 4PCS U-Chuck +4PCS 90 Degree Stem</p><p>Noice:</p><p>1.Please allow 0.1-0.5 inch difference due to manual measurement.(1 inch=2.54cm)</p><p>2. Instruction is not included.</p><p>3.Please check the size you need before you order.</p>