New old stock Johnson antique outboard motor piston rings.  This are 2 3/8ths ( 2.375) by 5/32nds ( .15625)  These will fit the

following Johnson outboards.  K40, KR40, K45, OK55, OK60 and OK75.  Black iron as original. Butt end rings.  You will have to notch them for pins if there are any.  There are 2 rings per piston.  Price is each.   Look at the photos and email with questions.  Thanks for looking.