It's the one with the barbed collar, but you could fill the collar cavities with silicone if you want a ball head.
Free shipping for Prime members, or if you order $35 worth of stuff.
http://www.amazon.com/Do-It-Molds-Tapered-Cavities-16-Ounce/dp/B002QG2G76
Edit:
The price was $21.25 when I posted but has dropped to $20.19. If you buy one and the price drops further within 7 days, Amazon will refund the difference.
Free shipping for Prime members, or if you order $35 worth of stuff.
http://www.amazon.com/Do-It-Molds-Tapered-Cavities-16-Ounce/dp/B002QG2G76
Edit:
The price was $21.25 when I posted but has dropped to $20.19. If you buy one and the price drops further within 7 days, Amazon will refund the difference.
