The circumference and length isn't quite as big as the one the machine came with, also the colour is a bit darker in person, more brown than peach.. Overall though, does the job, and prefer the addition of the balls on this.

Having the choice of different heads for my sex machine makes it more exciting to go up in my bedroom and choose one based on how I'm feeling and what type of pounding I want. I put this straight on my machine easy enough as it's just pop straight on and click into place. Felt very realistic, being that my other attachment doesn't have testicles. Made it feel like real sex feeling them against myself, helped me orgasm a lot easier. Nice size and texture!