This is a DCC Concepts DCW-W10.5R-OO Quality Resistive Wheelsets OO/16.5mm Track 8x 10.5mm (2'8") (8pcs)

Quality Resistive Wheelsets: OO/16.5mm Track 8x 10.5mm

8 pairs of 10.5mm super-quality wheelsets for 16.5mm track, each live axle to one wheel and pre-fitted with a resistor for triggering induction detectors etc. Superb free-running wheel profile slightly better than RP25-88. Super fine tolerances in manufacture of -0, +0.002″.. Including for squareness on the axles (Which is why we pack them so well – you cannot ship fine-scale wheels in a bag without risking quality). Gauge preset to the optimum running with this wheel profile – Please do not adjust unless absolutely necessary for your specific trackwork.