Champion Spark Plug J19LM #861-1 Replaces RJ19LM B2 B2LM B4LM B4LMBL1 B4LMYBL1 CS1 1147 3110 3410 6150 7931 Purchase is for one sparek plug. Condition: New This Champion spark plug works in many small engine brands and models. It can be used with chain saws, lawn mowers, pumps and trimmers. This plug utilizes a resistor to withstand high temperatures to suite your outdoor power equipment needs. For use with walk-behind lawn mowers, chain saws, pumps, and trimmers Fits most engine brands and models Designed to withstand high temperatures 14 mm thread, 9-1/2 mm reach and 20-3/5 mm hex size Non-resistor plug For four cycle engines New OEM Spark Plug Champion J19LM Blister Card Pack: MPN: 861-1 UPC: 037551011186 Shop Pack: MPN: 861s UPC: 037551660827 Champion J19LM Spark Plug. Set gap according to Operator's Manual for your engine USA domestic shipments are shipped USPS Ground Advantage Mail with Tracking When buying different variations from the same or similar listings, the lowest shipping cost is obtained by buying the total number of units wanted from 'One Variation' and then leaving a message within your order defining what items you want to receive and the number of each item you want to receive. The number of items requested cannot exceed the number shown as being in stock. This stops from restarting the total weight summation for each variation. The message link is on the same page where you select method of payment.USPS postage cost is based on total weight and zip code. The cost breakdown is shown before payment is required and the discount for multiple purchases is shown as a separte credit in the list.