Please look at the pictures. model number is assumed from information cross referenced against manufacturers literature.
NGTS???
(Standard size, 100mm scale, rear facing connections, stainless steel, ?= frame size, ?=o ring seals, ?=1/4" BSPP or 1/4" NPT)
RGTF 1 AHD-A for gases, 50-500 cm3/min flow rates, frame size 1