The two pieces snap together around the ignition wires. Wire holes are 8mm diameter, the automotive spark plug wire size supplied in E-Mag kits. Mounting holes are for 6/32 bolts.
The wire guards are much easier to install than rubber grommets. The raised circle on the face fits into a 1″ hole in the baffle.
Parts are printed from ABS filament that has a glass transition temperature higher than Nylon. N50KB has 175+ hours on its wire guards and has experienced no thermal distortion or other problems.
2 pair (4 cylinder engines) $16.00, shipping included. There was a price increase in January 2020 necessary due to increased postage and shipping materials costs.
Disclaimer: The wire guards are being offered below cost of production, packaging and shipping. Design and personal time costs are not included in the price. The wire guards are offered as a way in which fellow amateur aircraft builders who do not have direct access to 3D printers can obtain parts at a reasonable price.
FOR EXPERIMENTAL AIRCRAFT ONLY!