Part Number 991-4-14736-159 O Ring Seal 4 987 Inch I D in stock with ready to ship. Get an instant quote for Eaton Aviation Corporation part number 991-4-14736-159 by filling form below with your desired order quantity, targeted price and the expected order-fulfilment date. Get instant quote for 991-4-14736-159. Our dedicated account manager will get back to you within 15 minutes.