Hydraulic Sae 900 O-Ring Seal Kit (Buna-N 70-255 Pc. Kit) By Captain O-Ring. Product Details Includes high quality BN70 (Buna Nitrile 70 durometer) o-rings - the most common o-ring material Includes all sizes between -904 to -916 Used in sealing straight thread tube fittings (BOSS Type) in hydraulic equipment O-Rings are conveniently sorted by size in individual compartments. Assembled in the USA. Manufactured and Warrantied by Captain O-Ring LLC, with decades in a sealing and chemical industry Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.