225pcs/set Rubber O rings 18 Sizes Nitrile rubber gasket silicone o ring black of sealing rings NBR ring sealing kit With Box|Gaskets| - AliExpress
¼" Leather Show Slip Lead with Nickel O-ring - 48" long — White Pine Outfitters | Quality Dog Gear | Conformation Show Working Obedience Training | Soft Web™ Soft Slip™ Soft Snap™