Clamp Adapter 114mm diam. For Matte Box LMB-5/15/25.
Can be used with Master Primes, UP 14mm, UP 180mm, LDS-UP 14mm, LDS-UP 180mm and ALURA Lightweight Zooms 15.5-45 & 30-80. 

For matte box: LMB-5/15/25
Weight: 92g