For your consideration, here is a Singer Plastic Tube Thread Spindle, no. 116143, with box and small instruction sheet. The box has the number 116299-000 on the back also. It has a length of 2 3/4 inches and an outside diameter of an 1/4 inch.

I am not sure of the exact name of this part. If anyone knows I'd appreciate an education. The part and instruction sheet are in nice shape. The box has wear and the remains of a price sticker on it. Item pictured is the actual item up for sale and comes from a non-smoking household. (74.217d-.4hc)