BB: Double bevelled edge
BE : Bevelled edge
CBEH : Chrome plated bevelled edge with helical coil spring
CK1 : Chrome plated keystone
CK2 : Chrome plated keystone ID step
CK3 : Chrome plated keystone internally bevelled top
CK5 : Chrome plated keystone internally bevelled bottom
CP1 : Chrome plated parallel faced
CP2 : Chrome plated parallel faced internally stepped top
CP3 : Chrome plated parallel faced internally bevelled top
CP5 : Chrome plated parallel faced internally bevelled bottom
CR1 : Chrome plated barrel faced
CR2 : Chrome plated barrel faced internally stepped top
CR3 : Chrome plated barrel faced internally bevelled top
CT1 : Chrome plated taper faced
CT2 : Chrome plated taper faced internally stepped top
CT5 : Chrome plated taper faced internally bevelled bottom
CTN1 : Chrome plated taper faced napier
DX : Duaflex
E1 : Externally stepped top
GX : Oilmaster
LS : Laminated steel segments
MK1 : Molybdenum coated keystone
MK3 : Molybdenum coated keystone internally bevelled top
MP1 : Molybdenum coated parallel faced
MP3 : Molybdenum coated parallel faced internally bevelled top
MR2 : Molybdenum plated barrel faced internally stepped top
MT3 : Molybdenum coated taper faced internally bevelled top
MT5 : Molybdenum coated taper faced internally bevelled bottom
MTK1: Molybdenum coated taper faced keystone
N1 : Napier – externally stepped bottom with single hook
P1 : Parallel faced plain
P2: Parallel faced internally stepped top
P3 : Parallel faced internally bevelled top
P4 : Rectangular keystone
P5 : Parallel faced internally bevelled bottom
SS : Standard slotted
T1 : Taper faced plain
T3 : Taper faced internally bevelled top
T5 : Taper faced internally bevelled bottom (Reverse torsion)
TH1 : Tapered half-keystone
TN1 : Taper faced napier