An adapter for all of your airbrushing needs! This includes an adapter which works perfectly to connect the 1/8 male end of the compressor to the 1/4 inch female end of the Badger hose. The threads are smooth and these are clearly well machined. Connections: A1: M5-0.5 Female to 1/8" BSP Male A2: 1/8" BSP Male to 1/8" BSP Male A3: 1/8" BSP Male to 1/4" BSP Male A4: 1/8" BSP Male to 1/4" BSP Female A5: 1/8" BSP Female to 1/4" BSP Male A6: 1/4" BSP Male to 1/4" BSP Male A7: 1/4" BSP Female to M5x0.5 Male Item Size: A1: 13 * 14mm / 0.51 * 0.55in (D * H) A2: 12 * 17mm / 0.47 * 0.67in (D * H) A3: 13 * 20mm / 0.51 * 0.79in (D * H) A4: 16 * 21mm / 0.51 * 0.83in (D * H) A5: 16 * 17mm / 0.51 * 0.67in (D * H) A6: 14 * 22mm / 0.55 * 0.87in (D * H) A7: 16 * 24mm / 0.51 * 0.94in (D * H) Package included: 7 * Airbrush Adaptor