Specifications:Suitable for fireplaces and commercial appliances and any Gas itemsSurface material: stainless steel with zincApplicable gas series: LPG / propane / butane/NGCeramic Length:58mm.Thread size: M10 x 1Color: black + whitematerial: metalPackage Contents:20X electrode sparksSafety warning:This is a Universal Thread if your installation hole size is Over 10mm and less than 14mm. If can not install well you can do some small modifications on your product.Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.