Univesral Knob for 75/100 or 150mm half ball Works with Slidekamera, Manfrotto, Sachtler, Miller and other Half Ball Female thread: M10 or 3/8" (16 UNC or 24 NUF) Made by Slidekamera in EU 

For the location photographer Compatible with Skylite rapid alluminum frames Folds down fast

Material: nickel-plated steelSize: 1/4 inch thread 3/8 inch threadLength: 18mm 

Distinctive vintage style look Double sided Set up anywhere Portable and quick to set up Collapsible to a third of the original size

Easily attach any collapsible backgrounds with a steel rim Reliable magnetic connectors Designed to fit industry standard 5/8 spigot connector

Color: blackMaterial: hard anodized aluminium 

For the location photographer Compatible with Skylite rapid alluminum frames Folds down fast

For the location photographer Compatible with Skylite rapid alluminum frames Folds down fast