XS Scuba Standard Cam Bands This Item Includes: Pair of Cylinder Cam Bands Injection-Molded Cam Buckles Buckle: Molded from Nylon with Glass Fill Short Length for 4.0" to 5.0" (10.2 to 12.7 cm) Diameter Cylinders Standard Length for 6.9" to 8.0" (18.4 and 20.3 cm) Diameter Cylinders