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OPW 634TT Tight -Fill Top Seal Caps (634TT-7085-EVR) <br />Tight -Fill Top -Seal Caps are installed on top seal adaptors, when not in use, to prevent <br />gasoline vapors from escaping and to prevent water, dust and debris from entering the <br />tank. <br />The OPW 634TT is designed to mate with 4" 633T, 633TE, 61 SA, 633TC, and 633TCP <br />Top -Seal Adaptors. Heavy duty and corrosion resistant, the body is made of Duratuffs to <br />help eliminate rust and oxidation for a long, maintenance -free life. The toggle lever <br />distributes downward pressure to compress its Buna-N gasket evenly, assuring a positive, <br />water and vapor -tight seal. The 634TT can be locked with a padlock or wire seal. <br />Table of Contents: <br />1. Materials <br />2. Ordering Specifications and Replacement Parts <br />97 <br />