Features: brand new and high quality 360 swivel scuba diving dive regulator adaptor with steel ball. Made of chrome plated marine grade brass,durable and corrosion resistant. Helps prevent second stage pulling from mouth when for head turns. Increased comfort of second stage regulator. Length:Approx.5.5cm/ 2.2inch; Diameter:Approx.1.4cm/0.6inch. Specifications: Material: Chrome Plated Copper Color: As The Picture Shows Type Optional: SA11/SA12/SA14 SA11 Size: approx.49x36mm/1.92x1.41in SA12 Size: approx.46x22mm/1.81x0.86in SA14 Size: approx.52x34mm/2.04x1.33in Package Includes: 1Pc x Scuba Diving Regulator note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!