【What You Will Get】 Tri clover gasket fit standard 1" tri-clover or tri-clamp fittings, Outer Dia: 1.98" / 50.5mm, Inner Hole Dia: 0.87" / 22mm. They can play the role of gasket, seal, buffer, etc. They are also used for sealing the piston and piston rod of reciprocating hydraulic cylinder.
eBay