It includes a new copper 9-bolt head gasket in addition to all the o-rings

This is a flat-bottom tank

there are 4 of these on each bike

set it on the table and try and lift it with a large screwdriver

Nevertheless

Whiskey Throttle Tube - Aluminum - 1 inch Motorcycle Specific_Harley-Davidson Sportster It includes a new copperCNC machined 6061 T 6 aluminum construction Fits 1 inch O. D. handlebars, accepts dual cable throttle assemblies Knurled alloy tube accepts aftermarket rubber grips Black electroplate or clear anodized over raw aluminum finish Retrofits to many model year stock and select aftermarket H D hand controls Stock Harley grips are molded to a flexible plastic tube inside the hand control, and don't provide the precision feel befitting a custom motorcycle.