Double pin clips and collars to fit certain booms:

• collars fit 30mm outer diameter boom arm
• stainless pins are 6mm wide
• clips are available with 2cm or 1" center to center pin spacing
• each kit comes with two collars and two clips to retrofit one boom
• fits some carbon or aluminum booms from HPL, Simmer, Aeron, Naish, etc...

Note:  NOT COMPATIBLE with older HPL carbon booms w/ the red hinged adjustment lever (will fit but pins are a little too small in diameter to provide a tight fit)