1 1/2"Screw Hex head nipple NPT CS 3000 # 20 pcs 2 3/8" Screw Hex Head Nipple NPT CS 3000# 20 pcs 3 1/4" Screw hex head Nipple NPT CS 3000 # 20 pcs 4 1/2" Female Screw NPT Straight steel coupling CS 3000 # 20 pcs 5 3/8" Female Screw NPT straight steel coupling CS 3000 # 20 pcs 6 1/4" Female Screw straight steel coupling CS 3000 # 20 pcs 7 1" Male NPT x 1/2" female screw NPT Bushing CS 3000 # 20 pcs 8 1/2"Male x3/8" Female screw NPT Bushing CS 3000 # 20 pcs 9 3/8" Male NPT x 1/4" female Screw NPT Bushing CS 3000 # 20 pcs