Aluminum Conical Seat Washers from Kart Master If the factory seat washers that came with your kart are plastic or are in need of replacement, these aluminum conical seat washers from Kart Master are for you! Conical seat washers allow you to mount a seat to a kart chassis without having mounting hardware interfere with you when you're sitting down, and these aluminum conical seat washers are durable enough to last for the life of your kart. These aluminum seat washers are priced individually and are available in gold, black, blue and red. If you would like to order these conical seat washers, place them in your shopping cart for quick and easy checkout or contact K1 Race Gear today for further assistance.