Breakthrough Clean Technologies BCT Lens Pen Black. The BT Lens Cleaning Pen comes with a handy retractable dust removal brush and a special non-liquid cleaning element that is designed to never dry out. Specifications for Breakthrough Clean Technologies BCT Lens Pen: Manufacturer: Breakthrough Clean Technologies Length: 4.5 in Height: 0.5 in Color: Black Package Contents: Breakthrough Clean Technologies BCT Lens Pen Breakthrough Clean Technologies BT-LP-1: BCT Lens Pen Black