Type: Corrugated Type and flat type: Other sizes are also availbale: 15x4 2.5, 15x4.25 2.5, 15x4.5 2.5, 20x4 2.5, 20x4.25 2.5, 20x4.5 2.5, 22x4 2.5, 22x4.25 2.5, 22x4.5 2.5. Typre Model No Size thickness Quanttity/40” pallet Corrugated Type SB4015C 15× 4 2.5 4860 486 SB4215C 15× 4 .5 2.5 4590 459 SB4415C 15× 4.5 2.5 4320 432 8-5-42 C SB4020C 20× 4 2.5 2794 254 8-5-59C SB4220C 20× 4 .5 2.5 2640 240 8-5-53C SB4420C 20× 4.5 2.5 2486 226 8-5-49C SB4022C 22× 4 2.5 2180 218 8-5-38C SB4222C 22× 4 .5 2.5 2060 206 8-5-54C SB4422C 22× 4.5 2.5 1940 194 Flat type 8-5-41 SB4015K 15× 4 3.5 4860 486 8-5-48 SB3320K 20× 3 3 /8 3.5 3102 282 8-5-30 SB3520K 20× 3 5 /8 3.5 2948 268 8-5-42 SB4020K 20× 4 4 2794 254 8-5-59 SB4220K 20× 4 .5 3.5 2640 240 8-5-53 SB4420K 20× 4.5 3.5 2486 226 8-5-33 SB3322K 22× 3 3 /8 4 2420 242 8-5-34 SB3522K 22× 3 5 /8 4 2300 230 8-5-49 SB4022K 22× 4 4 2180 218 8-5-38 SB4222K 22× 4 .5 4 2060 206 8-5-54 SB4422K 22× 4.5 4 1940 194 8-5-41HD SB4015R 15× 4 4.5 4860 486 8-5-42HD SB4020R 20× 4 4.5 2794 254 8-5-59HD SB4220R 20× 4 .5 4.5 2640 240 8-5-53HD SB4420R 20× 4.5 4.5 2486 226 8-5-49HD SB4022R 22× 4 4.5 2180 218 8-5-38HD SB4222R 22× 4 .5 4.5 2060 206 8-5-54HD SB4422R 22× 4.5 4.5 1940 194