These (Twin Tech 24003) , (WIX 24003, 24744, 10429) / (NAPA 4003, 4744, 600429) style filter caps have (1 7/8" x 16 threads per inch O.D. thread) by (13/16" x 16 threads per inch I.D. thread). They are made form 6061 T6 aluminum and are less than 1/2 the weight of our stainless steel filter caps. Weight 2.1oz. (59grams)
O-Rings sold separate.
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