QUICK RELEASE MOUNT (Zero) for Blaser Retainer: Pulsar Thermion Construction height: 20mm Ring: 30mm Ring lower part: 9mm Item number: QUICK RELEASE MOUNT (Zero) for Blaser Retainer: Pulsar Thermion Construction height: 20mm Ring: 30mm Ring lower part: 9mm Item number: 40-TH-20-00-800