Comparison : Item # 1317-28-220, 1/4" x 1/8" MPT Brass Reducing Hex Nipple
Item # 1317-28-220L, 1/4" x 1/8" MPT Brass Reducing Hex Nipple
Item # 1317-28-221, 3/8" x 1/8" MPT Brass Reducing Hex Nipple
Item # 1317-28-221L, 3/8" x 1/8" MPT Brass Reducing Hex Nipple
Item # 1317-28-222, 3/8" x 1/4" MPT Brass Reducing Hex Nipple