Testing Screen and Test-Master Trays with cloth No.16 (1.18mm) and finer have metal ribs installed to support mesh. No.4 stainless steel backing cloth reinforcement is included in Testing Screen Trays with No. 230 and finer cloth, and may optionally be added to other trays with or without support ribs. The Backing Cloth is built especially for use as reinforcement, and features flat-rolled surfaces to prevent abrasion of finer cloth. Porta-Screen trays with cloth from No.16 to No.100 use metal support ribs, and No.4 stainless steel backing cloth is included on these trays with mesh from No.100 to No.400 opening sizes.

Standard Size, in. (mm)	Cloth/Plate Material	Model
5 in. (125.0mm)	S	TSA-124 5"
4.24 in. (106.0mm)	S	TSA-132 4.24"
4 in. (100.0mm)	S	TSA-125 4"
3 1/2 in. (90.0mm)	S	TSA-125 3-1/2"
3 in. (75.0mm)	S	TSA-125 3"
2 1/2 in. (63.0mm)	S	TSA-125 2-1/2"
2.12 in. (53.0mm)	S	TSA-132 2.12"
2 in. (50.0mm)	S	TSA-125 2"
1 3/4 in. (45.0mm)	S	TSA-125 1-3/4"
1 1/2 in. (37.5mm)	S	TSA-125 1-1/2"
1 1/4 in. (31.5mm)	S	TSA-125 1-1/4"
1.06 in. (26.5mm)	S	TSA-132 1.06"
1 in. (25.0mm)	S	TSA-125 1"
7/8 in. (22.4mm)	S	TSA-125 7/8"
3/4 in. (19.0mm)	S	TSA-125 3/4"
5/8 in (16.0mm.)	S	TSA-125 5/8"
.530 in. (13.2mm)	S	TSA-132 .530"
1/2 in. (12.5mm)	S	TSA-125 1/2"
7/16 in. (11.2mm)	S	TSA-125 7/16"
3/8 in. (9.5mm)	S	TSA-125 3/8"
5/16 in. (8.0mm)	S	TSA-125 5/16"
.265 in. (6.7mm)	S	TSA-132 .265"
1/4 in. (6.3mm)	S	TSA-125 1/4"
No.3-1/2 (5.6mm)	S	TSA-132 #3-1/2
No.4 (4.75mm)	S	TSA-125 #4
No.5 (4.00mm)	SS	TSA-126A #5
No.6 (3.35mm)	SS	TSA-126A #6
No.7 (2.80mm)	SS	TSA-126A #7
No.8 (2.36mm)	SS	TSA-126A #8
No.10 (2.00mm)	SS	TSA-126A #10
No.12 (1.70mm)	SS	TSA-126A #12
No.14 (1.40mm)	SS	TSA-126A #14
No.16 (1.18mm)	SS	TSA-126B #16
No.18 (1.00mm)	SS	TSA-126B #18
No.20 (850µm)	SS	TSA-126B #20
No.25 (710µm)	SS	TSA-126B #25
No.30 (600µm)	SS	TSA-126B #30
No.35 (500µm)	SS	TSA-126B #35
No.40 (425µm)	SS	TSA-126B #40
No.45 (355µm)	SS	TSA-126B #45
No.50 (300µm)	SS	TSA-126B #50
No.60 (250µm)	SS	TSA-126B #60
No.70 (212µm)	SS	TSA-126B #70
No.80 (180µm)	SS	TSA-126B #80
No.100 (150µm)	SS	TSA-126B #100
No.120 (125µm)	SS	TSA-140 #120
No.140 (106µm)	SS	TSA-140 #140
No.170 (90µm)	SS	TSA-140 #170
No.200 (75µm)	SS	TSA-140 #200
No.230 (63µm)	SS	TSA-140 #230
No.270 (53µm)	SS	TSA-140 #270
No.325 (45µm)	SS	TSA-140 #325
No.400 (38µm)	SS	TSA-140 #400
No.4 Backup Cloth	S	TSA-135