L-Step Size ขนาด: 150 mm x 150 mm 100 mm x 300 mm 200 mm x 200 mm 150 mm x 250 mm 200 mm x 400 mm 250 mm x 350 mm U-Step Size ขนาด: 150 mm x 150 mm x 150 mm 150 mm x 200 mm x 150 mm 200 mm x 200 mm x 200 mm