Click or scroll to zoom Tap or pinch to zoom GRAV® 14mm Male to 19mm Female Expansion Adapter by GRAV $7.99 White - $7.99 Color White 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart GRAV® expansion adapters increase the diameter of a joint, making water pipes compatible with larger accessories. This adapter changes a 14mm female joint into a 19mm female joint.