clamp collar single-split made of stainless steel 1.4301, bore 6mm with bolt DIN 912: Clamp On Shaft Collars: Amazon.com: Industrial & Scientific
VGEBY Bicycle Seat Clamp with Quick Release Clamping Ring and Quick Release Suitable for 30.4 / 30.8 / 31.6 mm Mountain Bike Bikes (Colour: Silver-31.8) : Amazon.de: Sports & Outdoors
viva-adorno Piercing BCR Spring Ball Closure Ring Intimpiercing Klemmring Chirurgenstahl 316L Clip in Pop out XXL gold Z553, 10 x 16 x 14mm : Amazon.de: Fashion