Rectangular tube
RR.
Reducer concentric EN 10253-4
RK.
Reducer concentric, made from sheet
RKBL
Reducer concentric, seamless
NK.
Reducer eccentric, made from sheet
REBL
Reducer eccentric, seamless
NE.
Reducer eccentric, welded
RE.
Reducing elbow 90° F/F
RW.
Reducing hexagon nipple
RN.
Reducing socket
RM.
Reducing socket nipple
MN.
Reducing tee
TS.r