Spinlock PXR Single Cam Cleat 2-6mm Vertical Pivot Soundown there is a versatile EVO®

there is a versatile EVO® for any style or application

Cap is threaded 1/2  NPT to accept a barb fitting if you wish to vent overboard

scale 1:108

used individually or in combination they have special meanings

For use with two cylinders

Spinlock PXR Single Cam Cleat 2-6mm Vertical Pivot Soundown there is a versatile EVO®The Easiest Cleat To Release Under Load Compact roller action cam cleat for easy release of high performance control lines Fast precise control for hand tensioned lines Roller action ensures easy release under high load Hard anodised alloy cam and base Ideal for high performance lines Micro size for small diameters Three stage release control switch Ideal for single line spinnaker hoist systems Resists accidental re cleating