PrimaLuce Lab's adapters here are built around its focusers and rotators: ESATTO adapters for specific telescopes, including the Takahashi FSQ-106EDX, Borg 90FL and 107FL, Officina Stellare Veloce, GSO Ritchey-Chrétien and SC-thread tubes, plus thread adapters and extension tubes for the ESATTO 2", 3", 3.5" LP and 4", SESTO SENSO 2 adapters, and ARCO adapters. Part of T-Rings, Adapters & Spacers.