Check the listing for details. Rubber Dust Cover Scubas Diving Dust Caps for Diving Regulator First Stage. Condition: New, Made in China. Listed at 9.03 USD. Features: Make of rubber materials, strong, wear-resistance, Enduring. Specifically designs for regulator first stage DIN to JUK adapter. The dust cover of the diving regulator can prevent sand, dust and water from entering the first stage. Simple to install, not require complicated operations or complicated tool. Great for protecting your equipment through storage, travel, and harsh underwater conditions. Specifications: Materials: Rubber Total length: about 9.2cm/3.62inch Package Includes: 1pc Rubber Dust Caps Cover note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.