... leak out.Features:1) Popular Standard: BCuP-62) Popular Size: 1.6 x 6.9mm, 1.6 x 7.8mm, 1.6 x 9 ... .4mm, 1.8 x 9.4mm ... ,1.3 x 4.9 etc3 ... brazing copper parts in air-conditioners, freezers, refrigerators and motors 2% Silver Brazing Ring BCuP-6