Dixon BR-Series Pneumatic Female Pipe Coupler SKU Body Size Threads Material Length 1BRF1-B-7 1/8 1/8-27 NPT Brass 1.55 1BRBF1-B-7 1/8 1/8-28 BSPP Brass 1.55 1BRF2-B-7 1/8 1/4-18 NPT Brass 1.77 1BRBF2-B-7 1/8 1/4-19 BSPP Brass 1.77