Gitzo' S Center Ball Heads Are Extremely Balanced And Versatile Heads, Engineered And Designed Focusing On Ultimate Smoothness And Precision Of The Movement And Locking. Gh3382Qd Is The Large Sized Head Ideal For Series 2 And 3 Mountaineer Tripods, And Matches Well With Most Other Gitzo Tripods Series 2 And Above. Compared To The Smaller Versions, Gh3382Qd Has A Larger Ball And Quick Release Adapter, For Strong And Comfortable Use With Heavier Equipment. It Is Supplied With The Standard, Arca-Swiss Compatible Plate (Gs5370D), But Is Also Compatible With All Of Gitzo' S D Profile Plates And Fits Most Arca-Swiss Style Plates From Other Brands.