Pic 1. Boom Collar set 2 Pin For Pro 1 Alloy & Carbon 28mm Part No. 269. 

Pic 2. Boom Collar set 2 Pin For RDG Alloy 27mm Part No.269RA

Pic 3. Boom Collar set 2 Pin For RDG Carbon 24.5 mm Part No. 269RC

Pic 4. Boom Collar set 2 Pin For Alloy 200 / 225cm Part No. 269PC. Please CALL!

Pic 5. If you have an earlier single pin boom collar 1 1/8" ,  you can modify the boom to accept the later 2 pin version by drilling two extra holes in the boom arm (the tail end adjustment holes are correctly spaced to accept the 2 pin adjuster). Replace with 269 collars. 

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