Small black painted brass open-sided tubes attached to a press stud. One of these was attached to each of the strap loops on the MK.IV series goggles. The press stud could then be fastened to a helmet plate attached to the helmet. This helped to secure thes heavy goggles to the wearer and to keep them in position during use. Some loss of paint but in good used condition. One pair provided in similar or better condition than shown. Only a couple of pairs remaining now. Stock code G11638.