These Long Skirted Bayonet style gas caps (also known as cam gas caps) are vented and are made of chrome plated steel. The longer skirt gives you a classic throwback look to the tanks of yesteryear. An inexpensive cap that does the job and works with stock ('36 - '82) and aftermarket gas tanks with the bayonet style bung. This vented cap will work on single-cap model gas tanks or for the right-side gas tank on dual tank models. The left-side gas tank on dual tank models requires a non-vented gas cap. Replaces Harley-Davidson OEM # 61103-36.