Smoky and awesome, these single flare plugs are bold, but not too flashy. Though with a grey undertone and black wavy stripes lining the natural jasper stone, these plugs are smooth and polished for super comfortable wear. They have a length of 13 mm and come with “O” rings for your convenience. And they’re sold in pairs, so we’ll do our best to give you a matching set even though each and every plug is totally unique due to the nature of the material. They’re available in any of the following sizes: 8 gauge (3.2mm), 6 gauge (4mm), 4 gauge (5mm), 0 gauge (8mm), 00 gauge (10mm), 1/2 inch (12mm), 9/16 inch (14mm), and 5/8 inch (16mm).