Need to connect two of your favorite male accessories? Look no further – Grav Labs presents a Female to Female glass adapter with their signature scientific glass quality. The frosted glass-on-glass finish creates a seamless fit between pieces of 10mm, 14mm, and 18mm size. Thick and durable borosilicate glass take this piece to luxury levels with long-lasting quality. Use this piece to attach conflicting male-jointed accessories like nails, slides, and ash catchers into male-jointed water pipes including both bongs and dab rigs. Most commonly, it’s used to attach a dry herb slide to your dab rig. The clean lines and top-notch quality add – but do not detract – from the aesthetic of your favorite pipe with an extra spark of style. This petite glass piece fits in the palm of your hand in just a few inches length. Grav Labs guarantees the authenticity of this accessory with an etched glass logo on the exterior.