Here we have a Sprocket for a 1960's vintage Bowden Spacelander Bicycle. It comes to you, formed, heat treated, plated, and ready to mount on your restored bike, or display in your bike parts collection. This sprocket was made exactly like the original bike sprocket. I am not sure if you can use it in place of the reproduction bike that Mike Caplan offers. I'm sure you can make it work, but not sure what, if anything would need to be changed. Buyer be aware. It measures 6 5/8" across. This beautiful, rare bike sprocket is "ONE" of only "8" that were custom made by, Nostalgic Reflections of Veradale, Washington, who makes custom "One Off" parts for their customers who own and restore antique vehicles; cars, trucks, airplanes, motorcycles, bicycles, boats, tractors & snowmobiles. Insured shipping and handling in the USA is $19.75 and International is $38.00 "Registered Mail" with Tracking. Buyer will need to sign for delivery. Check our other listings for rare, hard to find, or unique parts.