Click or scroll to zoom Tap or pinch to zoom GRAV® Helix™ 14mm Multi-Purpose Kit Bubbler Attachment by GRAV $22.50 Etch - $22.50 Decal Color Etch 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart The 32mm Helix™ Replacement Bubbler Head has a 14mm joint and is designed for use with the Helix™ Multi-Purpose Kit.