Your search for "styrene" revealed the following:

Angle 2.0 x 2.0 x 350 mm: Evergreen plastic material, Non-scale 292

Round pipe 4mm outer diameter, 2.5mm inner diameter, 350mm length : Evergreen plastic material, non-scale 225

Square bar 0.28 x 3.2 x 350 mm: Evergreen plastic material, Non-scale 106

Transparent tube [O.D. 0.4mm] Approx. 1 metre : Sakatsu Material Non-scale 4523

The Red Pig [Hotel Adriano]: Sankei Kit 1:300 (1:144 and 1:48) MK07-15

Powdery material Country glass (1) Dark green : Moline material Non-scale CS-01

My Neighbor Totoro [Diorama full of Totoro] : Sankei Kit Non-scale MK07-35

Curved embankment parts - basic part (2 pieces): Molin material TM-11

Z channel 4.0 x 3.7 x 350 mm : Evergreen Plastic material, non-scale 752

Powdery material Kraft Sand (0.1 - 0.3mm) Dark grey : Molin material Non-scale AF-12

Marnie of Memories [Wet House] : Sankei Kit 1:220 MK07-24

Rock moulds Classic : Woodland material Non-scale C1236

Small Engine House : Baioudou HO(1:83) pre-colored kit ST-021-83C

Square bar 0.75 x 2.5 x 350 mm: Evergreen plastic material, Non-scale 135

Fibre-based material Glass selection Green : Molin material Non-scale GR-02

Sponge dark green coarse : Bush material non scale 7319

Stone material R-stone river stone for ravines large grey : Morin material non-scale 545

Stone Material R Stone Coal 1:87 : Moline Material HO (1:87) CL-03

CASTING PLASTER Large: Woodland material, Non-scale C1201

Stone-based material R-stone ballast N (0.6-0.9 mm) Main line light grey: Morin material N (1:150) 431